INTRODUCTION
Torques for British Standard Pipe Parallel (BSPP) straight-pipe-thread port connections
Metric Tube OD
Ferrous
Non-Ferrous
BSPP
Thread
S-Series
(Heavy Duty)
L-Series
(Light Duty)
S-Series
(Heavy Duty)
L-Series
(Light Duty)
S-Series
(Heavy Duty)
L-Series
(Light Duty)
G 1/8 A
—
6 mm
—
21 N·m
(
15.5 lb ft
)
—
12.5 N·m
(
9.2 lb ft
)
6 mm
8 mm
G 1/4 A
8 mm
10 mm
63 N·m
(
46.5 lb ft
)
53 N·m
(
39.1 lb ft
)
38 N·m
(
28.0 lb ft
)
32 N·m
(
23.6 lb ft
)
10 mm
G 3/8 A
12 mm
12 mm
95 N·m
(
70.1 lb ft
)
84 N·m
(
62.0 lb ft
)
57 N·m
(
42.0 lb ft
)
50 N·m
(
36.9 lb ft
)
15 mm
G 1/2 A
16 mm
18 mm
136 N·m
(
100.3 lb ft
)
105 N·m
(
77.4 lb ft
)
82 N·m
(
60.5 lb ft
)
63 N·m
(
46.5 lb ft
)
G 3/4 A
20 mm
22 mm
210 N·m
(
154.9 lb ft
)
210 N·m
(
154.9 lb ft
)
126 N·m
(
92.9 lb ft
)
126 N·m
(
92.9 lb ft
)
G 1 A
25 mm
28 mm
400 N·m
(
295.0 lb ft
)
400 N·m
(
295.0 lb ft
)
240 N·m
(
177.0 lb ft
)
240 N·m
(
177.0 lb ft
)
G 1-1/4 A
30 mm
35 mm
525 N·m
(
387.2 lb ft
)
525 N·m
(
387.2 lb ft
)
315 N·m
(
232.3 lb ft
)
315 N·m
(
232.3 lb ft
)
G 1-1/2 A
38 mm
42 mm
660 N·m
(
486.8 lb ft
)
660 N·m
(
486.8 lb ft
)
396 N·m
(
292.1 lb ft
)
396 N·m
(
292.1 lb ft
)
NOTE:
Final torque tolerance is +/–
10%
of the given torque specification.
48194558 20/10/2017
48