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TABLE 1
INCH FASTENERS
NOMINAL DESIGN TORQUE
8AE J249
GRADE 5
(HEAD MARKING)
8AE J249
GRADE 8
(HEAD MARKING)
TYPICAL RECTANGULAR TORQUE
PATTERN
CAPSCREW
OR NUT
THREAD SIZE
AND PITCH
TYPICAL SQUARE TORQUE
PATTERN
(Nm.)
(FT
−
LBF)
(Nm.)
(FT
−
LBF)
1/4
−
20
11
8
16
12
5/16
−
18
24
17
33
25
3/8
−
16
42
31
59
44
7/16
−
14
67
49
95
70
1/2
−
13
102
75
144
106
9/16
−
12
148
109
208
154
5/8
−
11
203
150
287
212
TYPICAL CIRCULAR TORQUE
3/4
−
10
361
266
509
376
TYPICAL CIRCULAR TORQUE
PATTERN
