chapter 1 hexagon head bolts

8/6/2019 Chapter 1 Hexagon Head Bolts

1/7ED. 2001-A

ETE ST G

R

AGRATI GROUP

SPECIFICATIONS AND REFERENCE STANDARDS

HEXAGON HEAD BOLTS

Material

General requirements

Tolerances

Environmentalprescriptions

International Std.

International Std.

Steel

ISO 8992

4 5 6

e f g hISO 261 ISO 965-2 ISO 965-3 or upon request.

4.8 6.8 8.8 10.9 12.9 or upon request.

ISO 898-1 or other applicable standard

ISO 4759-1

ISO 4042 or other applicable standard

Electroplated coatings excluded for class 12.9

Limits for surface discontinuities are coveredin ISO 6157-1 and ISO 6157-3.

VDA 232-101 or other applicable standard

ISO 3269 ISO 16426 or other applicable standard

10

1

This chapter shows special hexagonal head bolts andscrews. The production range of the Agrati Group isshown in the corresponding table, while, with referenceto the typologies, the preferred choice of presentation

has been to introduce separately the different

characteristics of the products (head, bearing surface,shaft, end, possible assembled washer) leaving thefreedom to assembly the bolt or screw according toanyones own requirement.Reference standards and

requirements are indicated at the foot of the page.

Captive washer version

StandardsPositions

Grades

TABLE DESCRIPTION

Hexagon head shapeUnderhead shapeShaft shape

DESCRIPTION

Screw endsCaptive washer version

TESTG

TABLE

ER

Thread

MechanicalProperties

Finish

Surfacediscontinuities

Acceptability

Tolerance

Class

Standards

Standards

Standards

Standards


2/7

AGRATI GROUP

8

10

1216

20

25

30

35

40

45

50

55

60

70

80

90

100

110

120

130

140

150

160

180

200

220

240

260

280

300

ED. 2001-A

11

0.7 0.8 1 1 1.25 1.5 1.75 2 2 2.5 2.5 2.5 3 3 3.5

1 1.25 1.5 1.5 1.5 2 2 1.5 2 2 2

1 1.25 1.5 1.51

7 8 8 11 10 13 17 21 22 27 27 32 36 41 46

10 12 14 18 22 24 30 30 34 41 4613 15 19 24 27 32 36

16 22 34

17

Production range between the heavy stepped lines.Completed threaded screws may be produced up to the maximum limit defined by the dashed stepped line.Values of S according to ISO 272 normal series printed in bold.Values of S for heavy series printed in italic.

1

PRODUCTION RANGE

Pitch

Acrossflats

S

Thread

Lengths

M4 M5 M6 M7 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30


3/7

AGRATI GROUP

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HEXAGON HEAD BOLTS

TABLE TE : HEAD SHAPE

ED. 2001-A

TE1 : Hexagonal TE2 : With radial impressions

TE3 : Slotted TE4 : With circular embossing

TE5 : With double chamfer TE6 : Without chamfer

TE7 : Pan with cross recess TE8 : Pan


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AGRATI GROUP

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HEXAGON HEAD BOLTS

TABLE ST : UNDERHEAD SHAPE

ED. 2001-A

ST5 : Countersunk

ST3 : With washer face and gorge

ST1 : With washer face

ST4 : Without washer face, with gorge

ST2 : Without washer face

ST6 : Without washer face, with annular undercut

ST7 : Indented type A ST8 : Indented type B


5/7ED. 2001-A

HEXAGON HEAD BOLTS

TABLE G : SHAFT SHAPE

14

AGRATI GROUP1

G1 : Threaded up to the head

G3 : Partially threaded


G7 : Partially threaded with knurling



with two shaft diametersG4 : Partially threaded

with shaft ~ pitch diameter

with undercut shaft diameter with large body diameter


6/7

AGRATI GROUP

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HEXAGON HEAD BOLTS

TABLE E : SCREW ENDS

ED. 2001-A

E1 : Chamfered E2 : Long chamfered

E3 : Dog point

E5 : Truncated cone point E6 : Pilot point with truncated point

E7 : Pilot ogival point E8 : Ogival point

E9 : Pilot square point E10 : Scrape point type A

E11 : Scrape point type B E12 : Scrape point type C

E13 : Scrape point type D E14 : Scrape point type E

E15 : Scrape point type F

E4 : Pilot point with cone point


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AGRATI GROUP

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HEXAGON HEAD BOLTS

TABLE R : ASSEMBLED WASHERS

ED. 2001-A

R1 : Plain R2 : Plain large or extra large R3 : Thick plain

R4 : Plain with projections R5 : Curved spring R6 : Spring crinkled

R7 : Serrated lock R8 : Conical spring R9 : Curved spring plus plain

R10 : Spring crinkled plus plain R11 : Serrated lock plus plain R12 : Conical spring plus plain

R13 : Shaped plain type A R14 : Shaped plain type B R15: Plain plus plain large

chapter 1 hexagon head bolts

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