Torque Chart
|
Diameter & Thread Pitch |
Tensile Stress Area |
Grade-2 |
Grade-5 |
Grade-8 |
||||||
|
Clamp Load |
Dry Torque |
Lightly Lubricated Torque |
Clamp Load |
Dry Torque |
Lightly Lubricated Torque |
Clamp Load |
Dry Torque |
Lightly Lubricated Torque |
||
|
Inch2 |
Lbs. |
Lb./Foot |
Lb./Foot |
Lbs. |
Lb./Foot |
Lb./Foot |
Lbs. |
Lb./Foot |
Lb./Foot |
|
|
1/4-20 |
0.0318 |
1313 |
5 |
4 |
2025 |
8 |
6 |
2850 |
12 |
9 |
|
1/4-28 |
0.0364 |
1500 |
6 |
5 |
2325 |
10 |
7 |
3263 |
14 |
10 |
|
5/16-18 |
0.0524 |
2175 |
11 |
8 |
3338 |
17 |
13 |
4725 |
25 |
18 |
|
5/16-24 |
0.0580 |
2400 |
13 |
9 |
3675 |
19 |
14 |
5213 |
27 |
20 |
|
3/8-16 |
0.0775 |
3188 |
20 |
15 |
4950 |
31 |
23 |
6975 |
44 |
35 |
|
3/8-24 |
0.0878 |
3600 |
23 |
17 |
5588 |
35 |
26 |
7875 |
49 |
37 |
|
7/16-14 |
0.1063 |
4388 |
32 |
24 |
6788 |
49 |
35 |
9563 |
70 |
55 |
|
7/16-20 |
0.1187 |
4913 |
36 |
27 |
7575 |
55 |
41 |
10,650 |
78 |
58 |
|
1/2-13 |
0.1419 |
5850 |
49 |
35 |
9038 |
75 |
55 |
12,788 |
107 |
80 |
|
1/2-20 |
0.1599 |
6600 |
55 |
41 |
10,200 |
85 |
64 |
14,400 |
120 |
90 |
|
9/16-12 |
0.1820 |
7500 |
70 |
55 |
11,588 |
109 |
80 |
16,388 |
154 |
110 |
|
9/16-18 |
0.2030 |
8400 |
79 |
59 |
12,975 |
122 |
91 |
18,300 |
172 |
129 |
|
5/8-11 |
0.2260 |
9300 |
97 |
75 |
14,400 |
150 |
110 |
20,325 |
212 |
170 |
|
5/8-18 |
0.2560 |
10,575 |
110 |
83 |
16,350 |
170 |
128 |
23,025 |
240 |
180 |
|
3/4-10 |
0.3340 |
13,800 |
173 |
130 |
21,300 |
266 |
200 |
30,075 |
376 |
280 |
|
3/4-16 |
0.3730 |
15,375 |
192 |
144 |
23,775 |
297 |
223 |
33,600 |
420 |
315 |
|
7/8-9 |
0.4620 |
11,400 |
166 |
125 |
29,438 |
429 |
320 |
41,588 |
606 |
460 |
|
7/8-14 |
0.5090 |
12,600 |
184 |
138 |
32,475 |
474 |
355 |
45,825 |
668 |
501 |
|
1-8 |
0.6060 |
15,000 |
250 |
190 |
38,625 |
644 |
480 |
54,525 |
909 |
680 |
|
1-12 |
0.6630 |
16,425 |
274 |
205 |
42,300 |
705 |
529 |
59,700 |
995 |
746 |
|
1 1/8-7 |
0.7630 |
18,900 |
354 |
270 |
42,338 |
794 |
600 |
68,663 |
1287 |
960 |
|
1 1/8-12 |
0.8650 |
21,150 |
397 |
297 |
47,475 |
890 |
668 |
77,025 |
1444 |
1083 |
|
1 1/4-7 |
0.9690 |
24,000 |
500 |
380 |
53,775 |
1120 |
840 |
90,000 |
1875 |
1360 |
|
1 1/4-12 |
1.0730 |
26,550 |
553 |
415 |
59,550 |
1241 |
930 |
96,600 |
2013 |
1509 |
|
1 3/8-6 |
1.1550 |
28,575 |
655 |
490 |
64,088 |
1469 |
1100 |
103,950 |
2382 |
1780 |
|
1 3/8-12 |
1.3150 |
32,550 |
746 |
559 |
72,975 |
1672 |
1254 |
118,350 |
2712 |
2034 |
|
1 1/2-6 |
1.4050 |
34,800 |
870 |
650 |
78,000 |
1950 |
1460 |
126,450 |
3161 |
2360 |
|
1 1/2-12 |
1.5810 |
39,150 |
979 |
734 |
87,750 |
2194 |
1645 |
142,275 |
3557 |
2668 |
