APPENDIX E
TORQUE LIMITS
SAE Grade Number
1 o r 2
5
6 o r 7
8
Quality of
Indeterminate
Minimum
Medium
Best
Material
Commercial
Commercial
Commercial
Capscrew Head
Markings
Head marking may vary with different manufacturers.
Capscrew Body Size
Torque
Torque
Torque
Torque
(Inches)-(Thread)
Ft Lb (N·m)
Ft Lb (N·m)
Ft Lb (N·m)
Ft Lb (N·m)
1/4
20
5
(7)
8
(11)
10
(14)
12
(16)
28
6
(8)
10
(14)
14
(19)
5/16
18
11
(15)
17
(23)
19
(26)
24
(33)
24
13
(18)
19
(26)
27
(37)
3 / 8
16
18
(24)
31
(42)
34
(46)
44
(60)
24
20
(27)
35
(47)
49
(66)
7/16
14
28
(38)
49
(66)
55
(75)
20
30
(41)
55
(75)
78 (106)
1/2
13
39
(53)
7 5 ( 1 0 2)
85
(115)
20
105 (142)
40
(56)
8 5 ( 1 15
120 (163)
9/16
12
51
(69)
110 (149)
1 2 0 ( 1 6 3)
155 (210)
18
55
(75)
120 (163)
170 (231)
5
/8
11
83
(113)
150 (203)
1 6 7 ( 2 2 6)
18
210 (285)
95
(129)
170 (231)
240 (325)
3
/4
10
105 (142)
270 (366)
2 8 0 ( 3 8 0)
375 (508)
16
1 1 5 ( 1 5 6)
295 (400)
420 (569)
7 / 8
9
1 6 0 ( 2 1 7)
395 (536)
4 4 0 ( 5 9 7)
14
605 (820)
175 (237)
435 (590)
675 (915)
1
8
2 3 5 ( 3 1 9)
590 (800)
6 6 0 ( 8 9 5)
910(1234)
14
2 5 0 ( 3 3 9)
660 (895)
990(1342)
If replacement capscrews are of a higher grade than orginally supplied, use
torque specifications for that placement. This will prevent equipment damage
due to over torquing.
Always use the
not available.
torque values listed above when specific torque values are
E-1/(E-2 Blank)
TM 10-4320-344-24
70 (95)
