INTRODUCTION
Tapered thread connection tightening
BSPT
Thread size
NPTF
Thread size
Turns From Finger Tight (TFFT)
1/8–28
1/8–27
2 to 3 full turns
1/4–19
1/4–18
2 to 3 full turns
3/8–19
3/8–18
2 to 3 full turns
1/2–14
1/2–14
2 to 3 full turns
3/4–14
3/4–14
2 to 3 full turns
1–11
1–11-1/2
1-1/2 to 2-1/2 full turns
1-1/4–11
1-1/4–11-1/2
1-1/2 to 2-1/2 full turns
1-1/2–11
1-1/2–11-1/2
1-1/2 to 2-1/2 full turns
2–11
2–11-1/2
1-1/2 to 2-1/2 full turns
Torques for Banjo-bolt connectors (copper washer style)
Metric bolt thread
Hex size
Torque
M8x1.25
13 mm
(
0.5 in
)
13 N·m
(
9.6 lb ft
)
M10x1.25
17 mm
(
0.67 in
)
16 N·m
(
11.8 lb ft
)
M12x1.5
17 mm
(
0.67 in
)
40 N·m
(
29.5 lb ft
)
M14x1.5
19 mm
(
0.75 in
)
45 N·m
(
33.2 lb ft
)
M16x1.5
22 mm
(
0.9 in
)
48 N·m
(
35.4 lb ft
)
M18x1.5
24 mm
(
0.9 in
)
50 N·m
(
36.9 lb ft
)
M20x1.5
27 mm
(
1.1 in
)
73 N·m
(
53.8 lb ft
)
M22x1.5
32 mm
(
1.3 in
)
73 N·m
(
53.8 lb ft
)
M24x1.5
32 mm
(
1.3 in
)
73 N·m
(
53.8 lb ft
)
NOTE:
Final torque tol/–
10%
of the given torque specification.
Torques for 37° Flare hose connectors (JIC)
SAE
Dash size
UN/UNF
Thread size
Tube OD
Swivel nut torque
2
5/16–24
3.18 mm
(
0.125 in
) 1/8
8.25 N·m
(
6.1 lb ft
)
3
3/8–24
4.76 mm
(
0.187 in
) 3/16
11.5 N·m
(
8.5 lb ft
)
4
7/16–20
6.35 mm
(
0.25 in
) 1/4
15.5 N·m
(
11.4 lb ft
)
5
1/2–20
7.94 mm
(
0.313 in
) 5/16
20 N·m
(
14.8 lb ft
)
6
9/16–18
9.52 mm
(
0.375 in
) 3/8
25 N·m
(
18.4 lb ft
)
8
3/4–16
12.7 mm
(
0.5 in
) 1/2
52 N·m
(
38.4 lb ft
)
10
7/8–14
15.88 mm
(
0.625 in
) 5/8
81 N·m
(
59.7 lb ft
)
12
1-1/16–12
19.05 mm
(
0.75 in
) 3/4
112 N·m
(
82.6 lb ft
)
14
1-3/16–12
22.22 mm
(
0.875 in
) 7/8
133 N·m
(
98.1 lb ft
)
16
1-5/16–12
25.4 mm
(
1.0 in
) 1
155 N·m
(
114.3 lb ft
)
20
1-5/8–12
31.75 mm
(
1.25 in
) 1-1/4
180 N·m
(
132.8 lb ft
)
24
1-7/8–12
38.1 mm
(
1.5 in
) 1-1/2
225 N·m
(
166.0 lb ft
)
32
2-1/2–12
50.8 mm
(
2.0 in
) 2
348 N·m
(
256.7 lb ft
)
NOTE:
Final torque tol/–
10%
of the given torque specification.
Torques for 30° Flare and 60° Cone hose connectors
Nominal size
BSPP Thread size
Hex
Swivel nut torque
5, 6, 6.3
G 1/4
17.0 mm
(
0.7 in
)
25 N·m
(
18.4 lb ft
)
8, 9, 10
G 3/8
19.0 mm
(
0.7 in
)
34 N·m
(
25.1 lb ft
)
12, 12.54
G 1/2
22.0 mm
(
0.9 in
)
64 N·m
(
47.2 lb ft
)
15, 16, 19
G 3/4
30.0 mm
(
1.2 in
)
132 N·m
(
97.4 lb ft
)
25
G 1
36.0 mm
(
1.4 in
)
196 N·m
(
144.6 lb ft
)
31.5, 32
G 1-1/4
46.0 mm
(
1.8 in
)
225 N·m
(
166.0 lb ft
)
38
G 1-1/2
50.0 mm
(
2.0 in
)
255 N·m
(
188.1 lb ft
)
50, 51
G 2
65.0 mm
(
2.6 in
)
316 N·m
(
233.1 lb ft
)
NOTE:
Final torque tol/–
10%
of the given torque specification.
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