APPENDIX B. TORQUE REQUIREMENTS
Grade 5 Socket and Hexagon Head Capscrews
TENSILE
PROOF
CLAMP
TORQUE
STRENGTH
LOAD
LOAD
DRY
SIZE
(Min. PSI)
(PSI)
P(lb)
K=0.20
lb-in
4-40
120,000
85,000
380
8
4-48
120,000
85,000
420
9
6-32
120,000
85,000
580
16
6-40
120,000
85,000
640
18
8-32
120,000
85,000
900
30
8-36
120,000
85,000
940
31
10-24
120,000
85,000
1,120
43
10-32
120,000
85,000
1,285
49
1/4 - 20
120,000
85,000
2,020
96
1/4 - 28
120,000
85,000
2,320
120
Ib-ft
5/16-18
120,000
85,000
3,340
17
5/16-24
120,000
85,000
3,700
19
3/8-16
120,000
85,000
4,940
30
3/8-24
120,000
85,000
5,600
35
7/16-14
120,000
85,000
6,800
50
7/16-20
120,000
85,000
7,550
55
1/2-13
120,000
85,000
9,050
75
1/2-20
120,000
85,000
10,700
90
9/16-12
120,000
85,000
11,600
110
9/16-18
120,000
85,000
12,950
120
5/8-11
120,000
85,000
14,400
150
5/8-18
120,000
85,000
16,950
180
3/4-10
120,000
85,000
21,300
260
3/4-16
120,000
85,000
23,800
300
7/8-9
115,000
78,000
27,000
400
7/8-14
115,000
78,000
29,800
440
1-8
115,000
78,000
35,500
580
1-12
115,000
78,000
38,800
640
1 1/18-7
105,000
74,000
42,300
800
1 1/8-12
105,000
74,000
47,300
880
1 1/4-7
105,000
74,000
53,300
1,120
1 1/4-12
105,000
74,000
59,600
1,240
1 3/8-6
105,000
74,000
64,100
1,460
1 3/8-12
105,000
74,000
73,000
1,680
1 1/2-6
105,000
74,000
78,000
1,940
1 1/2-12
105,000
74,000
87,700
2,200
B-1
