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
Pound-feet
N-m
Pound-feet
N-m
Pound-feet
N-m
3/8 x 16
21
28
20
27
12
16
3/8 x 24
23
31
22
29
13
18
7/16 x 14
33
44
31
42
19
25
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
9/16 x 12
59
81
57
77
34
46
9/16 x 18
66
89
63
85
38
51
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
3/4 x 16
130
176
124
168
75
101
7/8 x 9
203
275
194
263
116
158
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
1-1/8 x 7
432
586
413
560
248
336
1-1/8 x 12
408
553
390
529
234
317
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
1-1/2 x 12
732
992
703
953
422
572
2.
Preparation
WARNING 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.
3.
How to Apply a Threadlocker
CAUTION 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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