Torque Requirements for Fasteners
PELLERIN MILNOR CORPORATION
Table 12: Torque Values for Stainless Steel Fasteners Larger Than 5/16-inch
Dimension
316 Stainless
18-8 Stainless
18-8 Stainless with
Loctite 767
3/8 x 16
21
28
20
27
12
16
23
31
22
29
13
18
7/16 x 20
35
47
33
45
20
27
1/2 x 13
45
61
43
58
26
35
1/2 x 20
47
64
45
61
27
37
59
81
57
77
34
46
5/8 x 11
97
131
93
125
56
75
5/8 x 18
108
150
104
141
62
84
3/4 x 10
132
179
128
173
77
104
130
176
124
168
75
101
7/8 x 14
202
273
193
262
116
157
1 x 8
300
406
287
389
172
233
1 x 14
271
367
259
351
156
211
432
586
413
560
248
336
1-1/4 x 7
546
740
523
709
314
425
1-1/4 x 12
504
683
480
651
288
390
1-1/2 x 6
930
1261
888
1204
533
722
732
992
703
953
422
572
2 : Fire Hazard—Some solvents and primers are flammable.
Use threadlocker and primers with sufficient airflow.
Do not use flammable material near ignition sources.
1. Clean all threads with a wire brush or a different tool.
2. Remove the grease from the fasteners and the mating threads with solvent. Make the parts
dry.
Note 3: LocTite 7649 Primer
™
or standard solvents will remove grease from parts.
3. Apply a spray of LocTite 7649 Primer
™
or equal on the fasteners and the mating threads. Let
the primer dry for one minute minimum.
How to Apply a Threadlocker
3 : Malfunction Hazard—Heat, vibration, or mechanical shocks can let the
fasteners loosen if you do not apply the threadlocker correctly. Loose fasteners can cause
malfunctions of the equipment.
Read the threadlocker manufacturer's instructions and warnings. Obey these instructions.
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