fuze, pd, m572, loading, assembling and packing

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●

MIL-F-46996B (MU)31 March 1970SUPERSEDESMIL-F-469$16A (MU)27’June 1968

MILITARY SPECIFICATION

FUZE, PD, M572, LOADING,ASSEMBLING AND PACKING 1>

; \1. SCOPE

1.1 This specification covers the loading, assembling,and packing for the t1572point Detonating Artillery AmrnunltlonFuze.

datepart

2. APPLICABLE DOCUMENTS

2.1 The following documents of the issue in effect onof invitation for bids or request for proposal, form aof this specification to the extent specified herein.

SPECIFICATIONS

MILITARY

MIL-A-2550

MIL-I-45607

MIL-D-46256A

MIL-P-60412

STANDARDS

MILITARY

q

MIL-STD-105 -

MIL-STD-109 -MIL-STD-331 -

MIL-STD-1168 -MIL-STD-1235 -

Ammunition and Special Weapons;General Specification forInspection Equipment, Supply and.Maintenance ofDetonator, Stab, M24, Loaiiing,Assembling and PackingPackaging, Packing and Marking forShipment of Artillery Type andRocket Fuzes, General Specificationfor

Sampling Procedures and Tables,)

for Inspection by Attributes(ABc-STD-105)Quality Assurance Terms and DefinitionsFuze and Fuze Components, Environmentaland Performance Tests forLot Numbering of AmmunitionSingle and Multilevel ContinuousSampling Procedures and Tables forInspection by Attributes

FSC : 1390

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MIL-F-46996B (MU)

DRAWINGS

ARMY

8880696 - Fuze, Point Detonating M572

PUBLICATIONS

ARMY +

ET-8880696 - Equipment Tabulation

(Copies of specifications, standards,.

drawings and publicationsrequired by suppliers in connection with specific procurementfunctions should be obtained from the procuring activity or asdirected by the contracting officer),

3. REQUIREMENTS

3.1 Material .-Materials and parts shall be in accordancewith applicable drawings and specifications .

3.2 Fuze assembly.-The PD, M572 Fuze assemblies shallcomply with all requirements specified on Drawing (Dwg)8880696 and with all requirements specified in applicablespecifications . I

3.3 Jolt and jumble .-The fuze assembly shall comply withthe requirements of MIL-STD-331, tests 101 and 102.

3.4 Transportation vibration.-The Illzeassembly shallcomply with the requirements of MIL-STD-331, test 104.

3.5 Arming and propagation test.-The loaded fuze assembly,dwg. NO. 8880696, shall arm an(ifunction high order whensubjected to this test. The test shall be performed inaccordance with ti.2.3.3.

3.6 Proving Ground

3.6.1 Premature bursts.-There shall be no premature burstsin the gun bore or in flight before impact when tested asspecified in 4.2.3.4.

.

3.6.2 FunctioningI

36.2,1 Superqui.ck.-The fuzes shall cause the projectileto function high order and shall show no evidence of reversefunctioning (see 6.4) when tested as specified in 4.2.3.4.

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MIL-F-46996B (MU)

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3.6.2.2 Delay.-The fuzes shall cause the projectile to?unctlon high order and shall show no evidence of reversefunctioning (see 6.4) when tested as specified In 4.2.3.4.

the

and

3.6.2.3 The fuze shall not breakup outside the muzzle.ofgun when tested as specified in 4.2.3.4.

3.7 Workmanship.-All parts and assemblies shall be loadedassembled in a thorough, workmanlike manner and all

manufacturing, processlngY and assembling operations shall becorrectly performed. All parts shall be free of burrs, sharpedges, cracks, dirt, grease, dust, and other foreign matter.The cleaning method used shall not be injurious to any partnor shall the parts be contaminated by the cleaning agent.All required markings shall.be neat, legible, and sharplydefined. )

4. QUALITY ASSURANCE ‘PROVISIONS

4.1, Responslbllity for Inspection. -Unless otherwisespecified fn the contract or purchase order, the supplier Isresponelble for the performance of all inspection requirementsas speclfled herein. Except as otherwise specified in thecontract order, the supplier may use his own or any otherfacllltles suitable for the performance of the inspectionrequirements specified herein, unless disapproved by theGovernment. The Government reserves the right to perform anyof the inspections set forth In the specification where suchinspections are deemed necessary to assure supplles and servicesconform to prescribed requirements. Reference shall be made toStandard MIL-STD-109 in order to define the terms used herein.The provisions of Specification MIL-A-2550 shall apply.

4.1.1 Submission of product.-At the time each completed lotof items deliverable under the contract is submitted to theGovernment for acceptance, the contractor shall supply thefollowing Information accompanied by a certificate which atteststhat the Information provided is correct and applicable to theproduct being submitted:

a. A statement that the lot complies with all of thequality assurance provisions specified in this specification.

b. Drawing and specification number and date, togetherwith Identlflcatlon and date of changes thereto.

c. A statement that allmaterlal purchased by thecontractor meets requirements , when such material Is controlledby Government or commercial specifications referenced In any ofthe contractual documents, and the certificates of conformanceare on file and aval.lable.for revfew.

d. Number of items in the lot.e. Date submitted.

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MIL-F-46996B (MU)

The certificate shall be signed by a responsible agent of thecertifying organization. The initial certificate submitted shall ●be substantiated by evidence of the agent’s authority to bind hisprincipal. Substantiation of the agent’s authority will not berequired with subsequent certificates unless, during the courseof the contract, this authority is vested in another agent of thecertifying organization.

4.2 Inspection provisions

4.2.1 Lot formation.–The term “inspection lot” as usedin this specification is defined as an essentially homogeneouscollection of units of product from which a representativesample is drawn and inspected to determine conformance withapplicable requirements. The sample selected shall representonly that quantity or units from which the sample was drawn antishall not be construed to represent any prior or subsequentquantities presented for inspection. Homogeneity shall beconsidered to exist provided the inspection lot has been producedby one manufacturer, in one unchanged process, in accordance withthe same drawing, ‘same drawing revision, same specification andsame specification revision and complies with the provisions forsubmission of product as specified in M1L-STD-105. Changes tothe process, specification, or drawing not affecting sa?ety,performance, interchangeability, or storaKe, as determined by theGovernment , shall not be deemed to alter the homogeneity of aninspection lot. All material submitted for inspection inaccordance with this specification shall comply with the ●homogeneity criteria specified herein regardless of the type ofsampling procedure which is being applied to determine conformancewith requirements. Lot numbering, as required, shall be inaccordance with MIL–STD–1168. Each lot shall contain:

a. Fuze metal parts components of one lot interfixnumber from one manufacturer.

b. Delay plunger assemblies of one lot interfixnumber: from-one manufacturer.

c. M125A1 Booster assemblies of one lot interfixnumber, from one manufacturer.

. d. M24 Detonators of one lot Interflx number fromone manufacturer.

4.2:2 Examination.–The examinations listed in the followingsubparagraphs shall be performed on inspection lots (see 4.2.1)of the components or assemblies desi~nated in the applicableparagraph headings. Inspection for critical defects (and majordefects, when so specified) shall be 100 percent. S,amplingplansfor major and minor defects shall be in accordance withMIL-STD-105 except that continuous sampling plans in accordancewith MIL–STD-1235 may be used if approved by the Government.


MIL-F-46996B (MU)

● Instead of applylng the AQL’s designated herein to the groups ofmajor and minor defects listed, the contractor may elect to applyAQL’s to individual defects using an AQL of 0.40 percent for eachmajor defect and an AQL of 0.65 percent for each minor defect.When this method is elected, it shall be applied to all of themajor and minor defects listed in the applicable subparagraphof this section, except where 100 percent inspection is specified,and be documented as part of the contractors inspection system.Equipment necessary for the performance of the inspections listedshall be in accordance with 4.2.4.

4.2.2.1 Head assembly (see dwg. 8798232 covering adetail of dwg. 8798219).

Categories Defects Method of Code No.Inspection

Critical: None defined.

Major T AQL 0.65 Percent101. Detonator missing or inverted .. Visual 01001102. Detonator cushion missing ...... Visual 01002103. Detonator retaining screw not

fully seated ,.................. Visual 01003104, Detonator retaining screw

●not staked ..................... Visual 01004

Minor : AQL 0.65 Percent201. Evidence of poor workmanship

~ (see 3.7) ...................... Visual 01005

4.2.2.2 Screw, detonator retaining (see dwg. 8:798234).

Categories Defects Method of Code No.Inspection


Major : AQ.L0.40 Percent101. Pitch diameter of thread, mfn. . Gage 06001

Minor : AQI,1.5 Percent

.: 201. Total length ................... Gage 06002202. Pitch diameter of thread, max. . Gage 06003203. Evidence of poor wor}cmanship

(see 3.7) ......................Visual 06005

4.2.2.3 Assembly prior to assemblinfl head assembly andbottom closing screw (see dwg. 8798219).

●Cate[~ories Defects Method of Code NO.

Inspection

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MIL-F-46gg6B

Critical1.

2.

Major :101.

102.103.

104.

Minor:201.

4.2.2.4

(Mu)

Delay PlunKer centrifugalplun~er pi; in armed condition . VisualInterrupter does not completelyobstruct the flash hole ........ Visual

AQL 0.65 PercentForeign matter in flash hole oron delay plunger assembly ...... VisualFlash tube stake missin~ ....... VisualForeign matter in flash tubecavity ......................... VisualDelay plunger assembly missing . Visual

AQL 0,65 PercentEvidence of poor workmanship(see 3.7) ...................... Visual

Body assembly loading (see dwg. 9234457).

Categories Defects Method ofInspection


Major: AQL 0.40 Percent101. Tape missing or does not

completely cover flash hole ... Visual

Minor: AQL 0.65 Percent201. Evidence of poor workmanship

(see 3.7) ...................... Visual

4.2.2.5 Assembly prior to assembling booster (see dwfl.8798219).

Categories Defects Method ofInspection


Major : AQL 1.0 Percent101. Total,,length, above max. ....... Gage102. Bottom closing screw not below

flush, min. .................... Gage103. O~ive covers any part of

setting sleeve ................. Visual104. Body thread damaged ............ Visual105. Delay time not specified on

fuze ........................... Visual106. Crack or puncture at ogive

dimples ........................ Visual

6

02001

02002

0200302004

0200502006

02007

Code No.

07001

07002

Code No

03002

03003

0300403005

03006

03007 0


MIL-F-46996B

10 107. Delay plunger assemblyinverted ........................ Visual-

Magnet

Minor: AQL 0.65 percent201. Evidence of poor workmanship

(see 3.7) ....................... Visual

4.2.2.6 Booster. rmior to final fuze “assernblv(see8595541 covering

Categories

Critical:

a de{a~l of dwg. 8$63535)., “

Defects Method ofInspection

1. Booster.in an armed orpartially armed condition(see 6.5) ....................... visual

Major: None defined,

Minor: None defined,

4.2.2.7 Assembly (see dwg. 8880696).

●Categories Defects


Major:101.

102.

103.

104,

105.106.

107... 108.

109.110.

Method ofInspection

AQL 1.0 PercentLength fro,mbase of boosterto flange,’above max. ........... GageSeparationbetween boosterand fuze’,above max. ............ GageTorque test failure (boosterto fuze) (see 4.3.4) .......... .... GageBooster stake missing orimproper ...................../..VisualThread damaged .................. VisualBooster thread, pitchdiameter, above max. ............ GageLoaded weight, min. ............. BalanceResin present on setting screw .. VisualSetting screw inoperable ........ ManualEvidence of poor workmanship(see 3.7) which includes presenceof epoxy resin on thread lead,epoxy resin inside flash tube,epoxy resin contamination on orin the M125Al Booster and presenceof epoxy resin on or in the M-1Delay plunger at the base of theM48A3Fuze ......................Visual

(MU)

03001

03010

dwg .

Code No.

04001

Code No.

05001

05002

05003

0500405005

05006050070500805009

05014

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NIIL-F-46g96B (MU)

111, Absence of epoxy filling ....... Visual

!4inor: AQL 1.5 Percent201. Marking missing, incorrect,

or unidentifiable .............. Visual202, Protective coating missing

from marking ................... Visual203. Firing pin closing disc

missing or damaged ............. Visual

4.2.2.8 Versamid 125 (see dwg. A$1234571).


Major: AQL 0.40 Percent101. Material not as specified ...... Visual

Minor: None defined.

4.2.3 ‘Testing

4.2.3.1 Jolt and jumble (see 3.3) - Critical defectsCode No. 05020 and 05021.

4’.2.3.1.1 Beginning with the first lot produced andcontinuing until three consecutive lots have complied with

05030 ●

05010

05011

05012 :

08001

the oacceptance criteria specified, a sample of thirty (30) loadedfuze assemblies shall be selected from each lot and subjectedto the jolt test specified in MIL-STD-331, test 101.test,

After thisthe assemblies shall not be disassembled but shall be

subjected to the jumble test, MIL-STD-331, test 102 The assembliesshall then be disassembled to determine compliance with MIL-STD-331.As a minimum inspection requirement for Critical defects, no M125AlBooster.,..Ml-delay.plunger or body interrupter shall be in an armedor partially armed condition. If any assembly fails to comply withthe requirements of MIL-STD-331, the lot shall be rejected. Testequipment shall be in accordance with 4.2.4. Assemblies subjectedto these tests shall not be returned to the lot.

4.2.3.1.2 After three consecutive lots have met the criteriaspecified in 4.2.3.1.1, ,a sample of ten (10) loaded fuze assembliesshall be selected from each lot for jolt and jumble tests. Exceptfor sample size, the test procedure and acceptance criteria shallbe those specified in 4.2.j.l.l.

4.2.3.2 Transportation vibration (see 3.4)Code No. 05022 for safety deficiencies and Major05023,

8

- Critical defect,defect, Code No.


MIL-F-46996B (MU)

c

4.2.3.2.1 Beginning with the first lot produced andontinuing until three consecutive lots have complied with theacceptance criteria specified, a sample of thirty (30) loaded“fuze assemblies shall be selected from each lot and subjectedto the transportation vibration test specified in MIL-STD-331,test 104. The assemblies shall then be disassembled to determinecompliance with MIL--STD-331. As a minimum inspection requirementfor Critical defects, no M125A1 Booster, Ml-delay plunger, orbody interrupter shall be in an armed or partially armedcondition. As a minimum inspection requirement for Major defects,no metal parts components shall be broken. If any assemblyfails to comply with the requirements of MIL-STD-331, the lotshall be rejected. Test equipment shall be in accordance with4.2.4. Assemblies subjected to this test shall not be returnedto the lot.

4.2.3.2.2 After three consecutive lots have met the criteriaspecified in 4.2.3.2.1, a sample of ten (10) loaded fuze assembliesshall be selected from each lot for transportation vibration tests.Except for sample size, the test procedure and acceptance criteriashall be those specified in 4.2.3.2.1.

4.2.3.3 Arming and propagation teSt (see 3.5) - ~Ia,jordefect - Arming, Code No. 05024 - Major defect - Propagation,Code No. 05025.-The test shall be performed as specified in 4.3.2using equipment in accordance with 4.2.Q. Fifty loaded fuze

a

ssemblies shall be randomly selected from each lot. All assemblieshall be tested in the delay position. The lot of fuzes shall be

rejected if more than two assemblies fail to function high order.

4.2.3.4 Proving ground

4.2.3.4.1 Premature burst (see 3.6.1) - Critical defect.-Any premature burst shall be cause for rejection of the lot.

4.2.3.4.2 Functioning (see 3.6.2) - Major defect

4.2.3.4.2.1 Beginning with the first lot produced andcontinuing until three consecutive lots have complied with thefollowing acceptance criteria, sixty–four (64) loaded fuzeassemblies shall be selected from each lot and tested as specifiedin 4.3.3. The acceptance criteria and the number offuzes testedshall be as specified in Table I.

.. TABLE I ,-

Target Sample Size Sample SizeWeapon !!22%@ Distance Superquick Delay

175mm Gun Ground or 20,000Water Impact Meters 32

175mm Gun

o

Ground RangeImpact Convenient --

Total : 32

--

32

32

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MIL-F-46996B.

Defect :“SUperqulck:

(MU)

~cceptance Criteria

Premature burstDudsReverse functionsFuze breakup (see3.6.2.3)

Premature burstDudsReverse functionsFuze breakup (see3.6.2.3)

o

Reject Code No.-

114

100011000210003

1 10004

0 1 100062 10007

; 4 10008

0 1 10009

4.2.3.4.2.2 After three consecutive lots have met thecriteria of 4.2.3.4.2.1, a total of forth (40) loaded fuze assembliesshall be selected from each lot and tested as specffied in 4.3.4.The acceptance criteria and number of fuzes to be tested shall beas specified in Table II.

TABLE II

TargetWeapon Target

Sample SizeDistance Superquick

175mm Gun Ground or 20,000Water Impact Meters

175mm Gun20

Ground RangeImpact Convenient --

Total : 20

Acceptance Criteria

Defect :Superquick:

premature burstDuds

o0

Reverse functionsFuze breakup (see

2

3.6.2.3) o

premature burstDuds

o

Reverse functions1

Fuze breakup (see2

3.6.2.3) o

123

1

Sample Size_ Delay

--

20

20

Code No.

100101001110012

10013

100151001610017

10018

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MIL-F-46996B (MU)

4.2.3.5 Check-test for deterioration of detonator, Ma,jordefect , Code No. 11001.-If the total elapsed time between theacceptance of any detonator lot and assembly of that lot intofuze lots exceeds two (2) years, or If the detonators have beensubject to adverse conditions, however brief, at any time sinceprevtous tests, the detonator lot shall be check-tested asspecified In MIL–D-46256 immediately prior to detonator assemblyinto fuzes. This test shall be performed by the contractor ondetonators selected by the Government inspector at the facilityassembling the detonators into the fuze. The test shall beconducted at Government expense without cost to the supplier wholoaded the detonator or the supplier assembling the detonatorinto the fuze, and shall constitute abasis For rejection againsteither supplier except where deterioration has occurred as adirect result of carelessness in handling, storaEe, etc. whilethe detonator lot is under the jurisdiction of either contractor.

4.2.4 Inspection Equipment .-Index of Inspection EquipmentList Number ET-8880696 I.dentlfies the Inspection equipment requiredto perform the examinations and tests prescribed in this section.The contractor shall design inspection equipment in accordancewith the Instructions in paragraph 6.3.

k.2.4.l Government rights to documentati-.l.-Inspectlonequipment drawings and lists provided and revised in accordancewith the requirements of the ET may be used by DOD activitiesfor desi@, procurement, manufacture, testing, evaluation,production and receiving inspection, overhaul, shippi.nq, storage,identification of stock, orderin~ and storage of replacementparts, Inspection of items at overhaul, general maintenance ofequipment, construction, survey and whenever inspection equipmentdrawings are needed.

4.2.4.2 Government use of contractor’s inspection and testequipment.-The contractor shall make available to the Governmentall inspection and test equipment necessary for determiningconformance with contract requirements. Personnel for operatingthe equipment, and verification of its accuracy, shall besupplied by the contractor for the performance of examinationor test by the Government.

4.3 Test methods and procedures

4.3.1 ,Joltand jumble.-The loaded fuze assembles shall be”subjected to the jolt test in accordance with MIL-STD-331, test101. After completion of the jolt test, the fuzes shall besubjected to the jumble test in accordance with MIL-S’I’D-331,teSt102. The ,Jumble test shall be conducted utlllzinsz a .Iumbleprotective” fixture as specified In 4.2.4.

,., .

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MIL-F-46g96B (MU)

ti.3.2 Arming and propagation test.-The loaded fuze assemblies o

less tetryl pellets shall be armed by spinning at no more than3000 rpm in a suitable test fixture (see 4.2.4). The assembliesshall then be impact detonated by dropping on a hard surface. Theassemblies shall be dropped while spinning. A high order functionshall create a hole at least one half inch in diameter in a one-eighth inch thick lead disc placed beneath the booster leadcharge. Assemblies which fail to function hi~h order shall bedisassembled to determine the cause of failure. The cause offailure shall be annotated on the inspection records for the lot.

4.3.3 Proving ground.-The Tuzes shall be assembled into any ‘projectile of the specified caliber for which the fuze is standardand tested in accordance with Table III. Smear camera coverageshall be employed for all rounds tested to determine fuzebreakup, The camera shall be set up approximately 100 feetfrom the weapon’s muzzle.

TABLE III

Weapon 175mm

Recommended Model M113Recommended Cartridge M437Recommended CharEe Zone 3Muzzle velocity (fps) 3000Pressure (psi) 50100Spin (rpm) lll~oo

4.3.4 Torque test .-The disassembly torque shall be appliedto the applicable component while holding the adjacent matingcomponent in such a manner as to avoid damage to either componentof the assembly.

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5. PREPARATION FOR DELIVERY

5..l..Packaging, packing and marking.-Packaging, packin~ andmarking shall be in accordance with the requirements andinspection procedures specified in MIL-P-60412.

6. NOTES

6.1 Ordering data.-Procurement documents shall specifythe following:

a. Title, number and date of this specification.b. Data cards.-Data cards shall be prepared for each

lot In accordance wfth the information specified in StandardMIL-sTD-1167.

6.2 Inspection code numbers .-The five digit code numbersassigned to the inspections herein ape to facilitate future data ●collection and analysis by the Government.


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MIL-F-46996B (MU)

contractor shall desiznthe inspection Equipment

Lists (EL) r~fe~enced on the appll~able ET In accordance withthe instructions or paragraphs 6.3.1 through 6.3.5. These code

6.3 Inspection equipment.-TheInspection eaulDment as reouired bv

numbers are used to correlate the characteristics cited onEquipment Lists with the inspections listed in this specification.They should also be cited as references on drawings of equipmentdesigns submitted by the coritractor (see 6.3.5.).

6.3.1 Inspection equipment lists (EL).-Inspection equipmentlists Ind%cate the availability of,inspection equipment designsby showing in the “number” column of the list of inspectionequipment (Form SMUPA 1010) the numbers of drawings or FederalStock numbers of existing equipment designs, or codes asindicated in paragraph 6.3.2. Design action required of thecontractor is described in paragraphs 6.3.3 and 6.3.4. Thecontractor will be required to prepare detailed drawings inaccordance with 6.3.4 for all tileequipment coded as !’ContractorDesign” in the number column. These contractor designs must beapproved by the Government prior to fabrication or procuringof the equipment. Designs shall be submitted for approval asspecified in 6.3.5.

6.3.2 Inspection equipment list codes,-The inspectionequipment as defined in 6.3.3 and 6.3.4 will be designated inthe EL by the following codes:

CD - Contractor design on controlled contractor formatand/or commercial equipment.

MU - Army design, mandatory for use.

6.3.3 Army designs.-Army designs are reflected on detaileddrawings which completely depict all the information necessaryfor the fabrication of the Item of inspection equipment. Thecontractor need provide no design when an Army design is listedfor an item of %nspection equipment. Army designs fall into twobasic classifications; mandatory (designated “MU”) andnon-mandatory.(indicated by drawing or Federal Stock Number).When an inspection equipment list references mandatory Armydesigns, the contractor shall comply with, and use thesedesigns accordingly. The contractor may, however, in connectionwith non-mandatory designs, and with the approval of theGovernment, design alternate inspection equipment or usecomparable commercial equipment to facilitate his operations,Such contractor prepared designs or commercial equipmentselections must be approved by the Government prior tofabrication or procuring of the equipment. Designs shall besubmitted for approval asspecified In 6.3.5.

6.3.4 Contractor designs.-Contractor designs are designsof inspection equipment for which the Government has assip,neddesign responsibility to the contractor. Contractor designsshal:lbe.supportedby detailed drawings which depict all


MIL-F-469g6B (MU)

information necessary to completely fabricate, calibrate andoperate an item of inspection equipment. This requires thatthe necessary views, dimensions, materials, finish, notes,operatfng and calibration Instructions be properly depicted Inaccordance with approved practices to the extent that furthercalculation or clarification will not be required. Unlessotherwise specified, contractor designs may be developed on theformat the contractor normally employs in his equipment desi~nprocedure provided such format reflects the detail andinformation specified above, subject to the following controls:All submitted contractor designs shall conform to M1L-D-1OOO,Category E, Form 2. Legibility and reproducibility shall permitconventional making of clearly understandable, high contrastreproductions. Contractors shall submit three copies of finaldesigns as a flat set. Designs shall be submitted for approvalas specified in 6.3.5.

6.3.5 Submission of contractor desi~ns.–All submitteddesigns shall contain a reference to the applicable five digitCode Number contained in Section 4 of this specification and theappropriate comPonent or assembly drawing number and revisionletter to which the specific design applies. Unless otherwisespecified on the EL, all designs of equipment for inspection ofdefects classified as critical and major shall be submitted foraPProval to the Commanding Officer, Picatinny Arsenal, ATTN:SMUPA-ND7. All other designs of inspection equipment shall beapproved by the inspection element of the a~ency administering

●the contract; submission shall be as directed by the contractingofficer. Partial submission of inspection equipment desf~ns ispermissible and encouraged. However, the Arsenal completion datefor design review will be based on the date of the finalsubmission of designs. Picatinny Arsenal design review will beaccomplished normally within one month after receipt.

6.4 Reverse functioning.-Reverse functioning is defined assuperquick (SQ) functioning of the fuze when set in the “Delay”position or delay functioning of the “SQ” position.

6.5 The armed condition of the M125Al booster is indicatedwhen the detonator is fully visible through the cover plate.(See Figure 1). The partially armed condition of the booster isindicated when the rotor is not lo~!.edby both spring–loadeddetents. (see Figures 2, 3, and 4). The “unarmed condition isindicated when the rotor Is locked by both spring loaded detentsand the detonator is not at all visible through the cover plate.(see Figure 5).

6.6 Cost of detonator deterioration check-test.-Thecontracting officer will arrange for the contractor to bereimbursed for the expense incurred in the performance of thedetonation check test.

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NIL-F-46996B

6.7 Identification of international standardizationagreements. -Certain provisions of Section 3, REQUIREMENTSthis specification are the subject of international

(Pv.J)

OF

standardization agreement ABc-iRl!Y-sTD-56. When amendment,revision, or cancellation of this specification is proposedthe departmental custodians will inform their respectivedepartment standardization offices so that appropriateaction may be taken respecting the international agreementconcerned.

6.8 Submission of test data.-In addition to the normaldistribution of records, when the fuze is proposed by theDepartment of the Army, a copy of all test data shall beforwarded to the following:

Commanding OfficerPicatinny Arsenal

I

ATTN :Iloverj

Custodian:Army-MU

S~IUPA-ND7 and I)J2New Jersey 07801

Preparing aCtlVity:Army-hNJ

●

✌✎

Project Number: 1390-A- 796


MIL-F-469g6B

——— —

a

3

FIGURE 1

BOOSTER ARMEDCRITICAL DEFECT

1. Red end of M17 Detonator completely visible in center ofcover plate.

I 2. Rotor completely fills curved slot in cover plate.3. Spring-loaded detents in IN position..

16


3

I

,

1.

2.3.

FIGURE 2

BOOSTER PARTIALLY ARMEDCRITICAL DEFECT

Red end of M17 Detonator partially visible’in center ofcover plate.Rotor completely fills curved slot in cover plate.Spring-loaded detents in IN position.—

17


1MIL-F-46996B

FIGURE 3

BOOSTER PARTIALLY ARMEDCRITICAL DEFECT

1. MIT Detonator not visible in center of cover plate.Rotor fills three-fourths of curved slot in cover plate.

$: Spring-loaded detents in OUT position.

3

18


MIL-F-46gg6B

I

.

FIGURE 4

BOOSTER PARTIALLY ARMED$ CRITICAL DEFECT

1. M17 Detonator not visible in center of cover plate.., 2. Rotor fills one-half of curved slot in cover plate.

3. Spring-loaded detents in OUT position.—

19

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---- —,..––.MIL-F-4b99bB

It

FIGURE 5

BOOSTER NOT ARMEDSAFE CONDITION

1. M17 Detonator not visible in center of cover plate.Rotor fills less than half of curved slot in cover plate.

;: Spring-1oaded detents locked in IN position.—

20


fuze, pd, m572, loading, assembling and packing

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