TM 9-2330-356-14
TORQUE LIMITS
Table F-1. Standard Torque Specifications.
USAGE
MUCH USED
MUCH USED
USED AT TIMES
USED AT TIMES
To 1/2-69,000
To 3/4 120,000
TO 5/8 140,000
150,000
(4850.7000)
(8436.0000)
(9842.0000)
(10545.0000)
CAPSCREW DIAMETER AND
MINIMUM TENSILE STRENGTH
To 3/464,000
To 1-115,000
To 3/4 133.000
PSI (KG/SQ CM)
(4499.2000)
(8084.5000)
(9349.9000)
To 1-55,000
(3866.5000)
QUALITY OF
MEDIUM
MINIMUM
BEST
MATERIAL
INDETERMINATE
COMMERCIAL
COMMERCIAL
COMMERCIAL
SAE GRADE NUMBER
1 or 2
CAPSCREW HEAD MARKINGS
CAPSCREW BODY SIZE
TORQUE
TORQUE
TORQUE
TORQUE
(INCHES) - (THREAD)
FT-LB (NM)
FT-LB (NM)
FT-LB (NM)
FT-LB (NM)
(16)
1/4-20
(7)
8
10
12
5
(11)
(14)
(19)
14
-28
(8)
10
6
(14)
5/16-18
(33)
11
(15)
24
(26)
17
19
(23)
27
-24
(37)
13
(18)
19
(26)
44
3/8-16
(60)
31
34
18
(24)
(46)
(42)
49
(66)
-24
20
35
(27)
(47)
7/16-14
70
(95)
28
49
55
(36)
(75)
(66)
78
(106)
-20
(41)
30
55
(75)
(142)
105
1/2-13
(115)
85
(53)
75
(102)
39
(163)
120
-20
41
(56)
65
(115)
(210)
155
9/16-12
(163)
120
(69)
110
(149)
(231)
170
(163)
-18
120
55
(75)
(285)
(226)
167
210
5/8-11
(113)
150
(203)
83
(325)
240
-18
(231)
(129)
170
95
(509)
375
(360)
260
3/4-10
(366)
(142)
105
270
(570)
420
-16
(400)
(156)
115
295
(820)
(597)
440
7/8-9
(536)
(217)
160
(915)
675
-14
(590)
175
435
(237)
(1234)
910
(895)
660
1-8
(800)
590
(319)
235
(1342)
990
-14
(695)
660
(339)
250
CAUTION: Capscrews threaded into aluminum may require reductions in torque of 30% or more, unless inserts are used.
NOTE: Do not use above values in place of those specified in the engine groups of this manual; special attention should be ob-
served in case of SAE Grade 6, 7, and 8 capscrews,
1. Always use the torque values listed above when specific specifications are not available.
2. The above is based on use of clean and dry threads.
3. Reduce torque by 10% when engine oil is used as a lubricant.
4. Reduce torque by 20% if new plated capscrews are used.
F-1/(F-2 Blank)
