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TORQUE SCREW SPECIFICATION
TIGHTENING SETTINGS OF NON-METRIC BOLTS (IN.)
PIN
SIZE
5/16-18
3/8-16
7/16-14
1/2-13
9/16-12
5/8-11
3/4-10
7/8-9
1-8
Standard pin ID.
Grade "2"
No Marks
GENERAL INFORMATION
Screws torque values.
Always replace bolts with others of the same grade. Metric screws have the class number
marked on the head.
Tighten the screws according to the table, unless otherwise indicated in operators manual.
Do not over tighten the screws, as this could cause failure during operation.
Note: DO NOT use these values if a different torque value for a specific application is
specified. The values given are for general use. Periodically check the tightening of the
screws.
GRADE "2"
Nm LB-FT
15
11
27
27
43
32
66
49
95
70
130
97
235
170
225
165
340
250
GRADE "5"
Nm LB-FT
24
17
42
31
67
49
105
76
150
110
205
150
360
265
585
430
875
645
Grade "5"
3 Marks
36
GRADE "8"
Nm
LB-FT
33
25
59
44
95
70
145
105
210
155
285
210
510
375
820
605
1230
910
Grade "8"
6 Marks
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