34
CAS440HT Air Compressor Manual Part # 99900838
FINE THREAD TORQUE CHART (METRIC)
COARSE THREAD TORQUE CHART (METRIC)
TIGHTENING TORQUE
TIGHTENING
TORQUE
SAE J429
GRADE 5
SAE J429
GRADE 8
SIZE
(DIA-
TPI)
BOLT DIA
(INCHES)
SAE J429
GRADE 5
SAE J429
GRADE 8
SIZE
(DIA-
TPI)
BOLT
DIA.
(INCHES)
PLAIN
(KG-M)
PLATED
(KG-M)
PLAIN
(KG-
M)
PLATED
(KG-M)
PLAIN
(KG-M)
PLATED
(KG-M)
PLAIN
(KG-M)
PLATED
(KG-M)
5/16-24 0.3125 3
2
4
3
5/16-18
0.3125
2 2 3 2
3/8-24 0.375 5
4
7
5
3/8-16
0.375 4 3 6 5
7/16-20 0.4375 8
6
11
8
7/16-14 0.4375
7
5
10
7
1/2-20 0.5
12
9
17 12
1/2-13
0.5
10 8
15 11
9/16-18 0.5625 17
12
24
18
9/16-12
0.5625 15 11 21 16
5/8-18 0.625 24
18
33 25
5/8-11
0.625 21 16 30 22
3/4-16 0.75
41
31
58 44
3/4-10
0.75 37 28 52 39
7/8-11 0.875 62
45
93 69
7/8-9
0.875 55 41 84 63
1-12 1
89 67 138
103
1-8 1
82 62 126
94
1 1/8-12 1.125
123
93
200
150
1
1/8-7
1.125 110 82
178 133
1 1/4-12 1.25
171
129
278
209
1
1/4-7
1.25
155 116 251 188
1 3/8-12 1.375
232
174
375
281
1
3/8-6
1.375 203 152 329 246
1 1/2-12 1.5
304
228
492
369
1
1/2-6
1.5
270 210 438 328
NOTES
1
Tightening torques provided are midrange.
2
Consult bolt manufacturer’s particular specifications, when provided.
3
Use flat washers of equal strength.
4
All torque measurements are given in kilogram-meters.
5
Torque values specified are for bolts with residual oils or no special lubricants applied. If special lubricants of
high stress ability, such as Never-Seez compound graphite and oil, molybdenum disulphide, colloidal copper or
white lead are applied, multiply the torque values in the charts by the factor .90. The use of Loctite does not affect
the torque values listed above.
WARNING
Anytime a gear-bearing bolt is removed, it must be replaced with a new bolt of the identical
grade and size. Once a bolt has been torqued to 75% of its proof load and then removed, the
torque coefficient may no longer be the same as when the bolt was new thus giving
indeterminate clamp loads after torquing. Failure to replace gear-bearing bolts may result in bolt
failure due to metal fatigue causing death or serious injury.
