bolt torques - stainless steel, brass aluminum bolts - engineer's handbook.pdf
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Reference Tables -- Bolt Torques - Stainless Steel, Brass Aluminum Bolts
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Bolt Torque Information
Standard Steel
Bolt Torques
Metric Steel
Bolt Torques
Hex Cap Screw
Torques and Clamp
Loads
S/S, Monel, Aluminum,
Brass, & Bronze Bolt
Torques
Whitworth Steel
Bolt Torques
18-8 & 316 S/S, Brass, Aluminum, Monel, Silicon Bronze
Torque Specifications
Bolt Size
Inches or #
Threads
Per Inch
Standard Dry Torque in Inch-Pounds
18-8
Stainless SteelBrass
Silicon
Bronze
2024-T4
Aluminum
316
Stainless SteelMonel
#256 2.5 2.0 2.3 1.4 2.6 2.5
64 3.0 2.5 2.8 1.7 3.2 3.1
#348 3.9 3.2 3.6 2.1 4.0 4.0
56 4.4 3.6 4.1 2.4 4.6 4. 5
#440 5.2 4.3 4.8 2.9 5.5 5.3
48 6.6 5.4 6.1 3.6 6.9 6.7
#540 7.7 6.3 7.1 4.2 8.1 7.8
44 9.4 7.7 8.7 5.1 9.8 9.6
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#632 9.6 7.9 8.9 5.3 10.1 9.8
40 12.1 9.9 11.2 6.6 12.7 12.3
#832 19.8 16.2 18.4 10.8 20.7 20.2
36 22.0 18.0 20.4 12.0 23.0 22.4
#1024 22.8 18.6 21.2 13.8 23.8 25.9
32 31.7 25.9 29.3 19.2 33.1 34.9
Bolt Size
Inches or #
Threads
Per Inch
Standard Dry Torque in Inch-Pounds
18-8
Stainless SteelBrass
Silicon
Bronze
2024-T4
Aluminum
316
Stainless SteelMonel
1/420 75.2 61.5 68.8 45.6 78.8 85.3
28 94.0 77.0 87.0 57.0 99.0 106.0
5/1618 132 107 123 80 138 149
24 142 116 131 86 147 160
3/816 236 192 219 143 247 266
24 259 212 240 157 271 294
7/1614 376 317 349 228 393 427
20 400 327 371 242 418 451
1/213 517 422 480 313 542 584
20 541 443 502 328 565 613
Bolt Size
Inches or #
Threads
Per Inch
Standard Dry Torque in Inch-Pounds
18-8
Stainless SteelBrass
Silicon
Bronze
2024-T4
Aluminum
316
Stainless SteelMonel
9/1612 682 558 632 413 713 774
18 752 615 697 456 787 855
5/811 1110 907 1030 715 1160 1330
18 1244 1016 1154 798 1301 1482
3/410 1530 1249 1416 980 1582 1832
16 1490 1220 1382 958 1558 1790
7/89 2328 1905 2140 1495 2430 2775
14 2318 1895 2130 1490 2420 2755
18 3440 2815 3185 2205 3595 4130
14 3110 2545 2885 1995 3250 3730
Bolt Size
Inches or #
Threads
Per Inch
Standard Dry Torque in Foot-Pounds
18-8
Stainless SteelBrass
Silicon
Bronze
2024-T4
Aluminum
316
Stainless SteelMonel
1 1/87 413 337 383 265 432 499
12 390 318 361 251 408 470
1 1/47 523 428 485 336 546 627
12 480 394 447 308 504 575
1 1/26 888 727 822 570 930 1064
12 703 575 651 450 732 840
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Allen Heads, Brass, & Bronze Bolts
Torque Specifications
Bolt Size
Inches or #
Coarse Threads
Per Inch
Standard Dry Torque in Foot-Pounds
Allen Head
160,000 psi
High Carbon
CaseH Steel
Machine Screw
60,000 psi
Yellow Brass
Machine Screw
70,000 psi
Silicone Bronze
#2 56 ... 2 in lb. 2.3 in lb.
#3 48 ... 3.3 in lb. 3.7 in lb.
#4 40 ... 4.4 in lb. 4.0 in lb.
#5 40 ... 6.4 in lb. 7.2 in lb.
#6 32 21 8 in lb. 10 in lb.
#8 32 46 16 in lb. 19 in lb.
#10 24 60 20 in lb. 22 in lb.
1/4 20 16 65 in lb. 70 in lb.
5/16 18 33 110 in lb. 125 in lb.
3/8 16 54 17 20
7/16 14 84 27 30
1/2 13 125 37 41
9/16 12 180 49 53
5/8 11 250 78 88
3/4 10 400 104 117
7/8 9 640 160 180
1 8 970 215 250
1-1/8 7 1520 325 365
1-1/4 7 2130 400 450
1-3/8 6 2850 ... ...
1-1/2 6 3450 595 655
1-5/8 6 4700 ... ...
1-3/4 5 6100 ... ...
1-7/8 5 8200 ... ...
2 4-1/2 8800 ... ...
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