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 TM 55-1905-223-24-2
APPENDIX D
TORQUE LIMITS
Current Usage
Much Used
Much Used
Used at Times
Used at Times
Minimum Tensile
To 1/2-69.000
To 3/4-120.000
To 5/8-140.000
150.000(1,034)
(476)
(827)
(965)
Strength psi
To 3/4-64.000
To 1-115.000
To 3/4-133.000
(421)
(793)
(917)
MPs
To 1-55.000
(379)
Quality of
Indeter-
Minimum
Medium
Best
Material
minate
Commercial
Commercial
Commercial
SAE Grade
1 or 2
5
6 or 7
8
Capscrew Head Markings
Manufacturer's marks may vary
These are all SAE
Grade 5 (3 line)
Capscrew Body Size
(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
(24)
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
41
(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)
D-1
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