TM 10-4320-303-13
APPENDIX G
TORQUE LIMITS
SAE Grade Number
1 or 2
5
6 or 7
8
Quality of
Material
Capscrew Head
Markings
Indeterminate
Minimum
Commercial
Medium
Commercial
Best Commercial
NOTE
Head marking may vary with different manufacturers.
Capscrew Body Size
Torque
Torque
Torque
Torque
(Inches)-(Thread)
Ft Lb (Nm)
Ft Lb (Nm)
Ft Lb (Nm)
Ft Lb (Nm)
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)
70
(95)
20
30
(41)
55
(75)
78
(106)
1/2
13
39
(53)
75
(102)
85
(115)
105
(142)
20
40
(56)
85
(115)
120
(163)
9/16
12
51
(69)
110
(149)
120
(163)
155
(210)
18
55
(75)
120
(163)
170
(231)
5/8
11
83
(113)
150
(203)
167
(226)
210
(285)
18
95
(129)
170
(231)
240
(325)
3/4
10
105
(142)
270
(366)
280
(380)
375
(508)
16
115
(156)
295
(400)
420
(569)
7/8
9
160
(217)
395
(536)
440
(597)
605
(820)
14
175
(237)
435
(590)
675
(915)
1
8
235
(319)
590
(800)
660
(895)
910)
(1234
14
250
(339)
660
(895)
990
(1342)
CAUTION
If replacement capscrews are of a higher grade than originally supplied, use torque
specifications for that placement. This will prevent equipment damage due to over
torquing.
NOTE
Always use the torque values listed above when specific torque values are not
available.
G-1/(G-2 Blank)
