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Reference Tables -- Bolt Torques - Stainless Steel, Brass Aluminum Bolts

 

Bolt Torque Information
S/S, Monel, Aluminum, Brass, & Bronze 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 Steel
Brass
Silicon
Bronze
2024-T4
Aluminum
316
Stainless Steel
Monel
#2 56 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
#3 48 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
#4 40 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
#5 40 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
#6 32 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
#8 32 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
#10 24 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 Steel
Brass
Silicon
Bronze
2024-T4
Aluminum
316
Stainless Steel
Monel
1/4 20 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
5/16 18 132 107 123 80 138 149
24 142 116 131 86 147 160
3/8 16 236 192 219 143 247 266
24 259 212 240 157 271 294
7/16 14 376 317 349 228 393 427
20 400 327 371 242 418 451
1/2 13 517 422 480 313 542 584
20 541 443 502 328 565 613
Bolt Size
Inches or #
Threads
Per Inch
Standard Dry Torque in Inch-Pounds
18-8
Stainless Steel
Brass
Silicon
Bronze
2024-T4
Aluminum
316
Stainless Steel
Monel
9/16 12 682 558 632 413 713 774
18 752 615 697 456 787 855
5/8 11 1110 907 1030 715 1160 1330
18 1244 1016 1154 798 1301 1482
3/4 10 1530 1249 1416 980 1582 1832
16 1490 1220 1382 958 1558 1790
7/8 9 2328 1905 2140 1495 2430 2775
14 2318 1895 2130 1490 2420 2755
1 8 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 Steel
Brass
Silicon
Bronze
2024-T4
Aluminum
316
Stainless Steel
Monel
1 1/8 7 413 337 383 265 432 499
12 390 318 361 251 408 470
1 1/4 7 523 428 485 336 546 627
12 480 394 447 308 504 575
1 1/2 6 888 727 822 570 930 1064
12 703 575 651 450 732 840


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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