62
P425AWIR (7/120), XP375AWIR (9/110),
HP375AWIR (10/105), VHP300AWIR (14/85)
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
