INTRODUCTION
Torques for four-bolt flange connections (Inch grade 8)
Bolt
Length
Bolt
(SAE Code 61)
Torque
(SAE Code 61)
Bolt
(SAE Code 62)
Torque
(SAE Code 62)
13 mm
(
0.5 in
)
5/16–18
34 N·m
(
25.1 lb ft
)
5/16–18
34 N·m
(
25.1 lb ft
)
19 mm
(
0.75 in
)
3/8-16
63 N·m
(
46.5 lb ft
)
3/8-16
63 N·m
(
46.5 lb ft
)
25 mm
(
1.0 in
)
3/8-16
63 N·m
(
46.5 lb ft
)
7/16-14
97 N·m
(
71.5 lb ft
)
32 mm
(
1.25 in
)
7/16-14
97 N·m
(
71.5 lb ft
)
1/2-13
158 N·m
(
116.5 lb ft
)
38 mm
(
1.5 in
)
1/2-13
158 N·m
(
116.5 lb ft
)
5/8-11
310 N·m
(
228.6 lb ft
)
51 mm
(
2.0 in
)
1/2-13
158 N·m
(
116.5 lb ft
)
3/4-10
473 N·m
(
348.9 lb ft
)
64 mm
(
2.5 in
)
1/2-13
158 N·m
(
116.5 lb ft
)
—
—
76 mm
(
3.0 in
)
5/8-11
310 N·m
(
228.6 lb ft
)
—
—
89 mm
(
3.5 in
)
5/8-11
310 N·m
(
228.6 lb ft
)
—
—
102 mm
(
4.0 in
)
5/8-11
310 N·m
(
228.6 lb ft
)
—
—
127 mm
(
5.0 in
)
5/8-11
310 N·m
(
228.6 lb ft
)
—
—
NOTE:
Final torque tol/–
10%
of the given torque specification.
48194558 20/10/2017
55
