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Tapered thread connection tightening
BSPT
Thread size
1/8–28
1/4–19
3/8–19
1/2–14
3/4–14
1–11
1-1/4–11
1-1/2–11
2–11
Torques for Banjo-bolt connectors (copper washer style)
Metric bolt thread
M8x1.25
M10x1.25
M12x1.5
M14x1.5
M16x1.5
M18x1.5
M20x1.5
M22x1.5
M24x1.5
NOTE: Final torque tolerance +/– 10% of the given torque specification.
Torques for 37° Flare hose connectors (JIC)
SAE
Dash size
2
3
4
5
6
8
10
12
14
16
20
24
32
NOTE: Final torque tolerance +/– 10% of the given torque specification.
Torques for 30° Flare and 60° Cone hose connectors
Nominal size
5, 6, 6.3
8, 9, 10
12, 12.54
15, 16, 19
25
31.5, 32
38
50, 51
NOTE: Final torque tolerance +/– 10% of the given torque specification.
INTRODUCTION
NPTF
Thread size
1/8–27
1/4–18
3/8–18
1/2–14
3/4–14
1–11-1/2
1-1/4–11-1/2
1-1/2–11-1/2
2–11-1/2
Hex size
13 mm (0.5 in)
17 mm (0.67 in)
17 mm (0.67 in)
19 mm (0.75 in)
22 mm (0.9 in)
24 mm (0.9 in)
27 mm (1.1 in)
32 mm (1.3 in)
32 mm (1.3 in)
UN/UNF
Thread size
5/16–24
3/8–24
7/16–20
1/2–20
9/16–18
3/4–16
7/8–14
1-1/16–12
1-3/16–12
1-5/16–12
1-5/8–12
1-7/8–12
2-1/2–12
BSPP Thread size
G 1/4
G 3/8
G 1/2
G 3/4
G 1
G 1-1/4
G 1-1/2
G 2
48048569 26/04/2017
Turns From Finger Tight (TFFT)
Tube OD
3.18 mm (0.125 in) 1/8
4.76 mm (0.187 in) 3/16
6.35 mm (0.25 in) 1/4
7.94 mm (0.313 in) 5/16
9.52 mm (0.375 in) 3/8
12.7 mm (0.5 in) 1/2
15.88 mm (0.625 in) 5/8
19.05 mm (0.75 in) 3/4
22.22 mm (0.875 in) 7/8
25.4 mm (1.0 in) 1
31.75 mm (1.25 in) 1-1/4
38.1 mm (1.5 in) 1-1/2
50.8 mm (2.0 in) 2
Hex
17.0 mm (0.7 in)
19.0 mm (0.7 in)
22.0 mm (0.9 in)
30.0 mm (1.2 in)
36.0 mm (1.4 in)
46.0 mm (1.8 in)
50.0 mm (2.0 in)
65.0 mm (2.6 in)
23
2 to 3 full turns
2 to 3 full turns
2 to 3 full turns
2 to 3 full turns
2 to 3 full turns
1-1/2 to 2-1/2 full turns
1-1/2 to 2-1/2 full turns
1-1/2 to 2-1/2 full turns
1-1/2 to 2-1/2 full turns
Torque
13 N·m (9.6 lb ft)
16 N·m (11.8 lb ft)
40 N·m (29.5 lb ft)
45 N·m (33.2 lb ft)
48 N·m (35.4 lb ft)
50 N·m (36.9 lb ft)
73 N·m (53.8 lb ft)
73 N·m (53.8 lb ft)
73 N·m (53.8 lb ft)
Swivel nut torque
8.25 N·m (6.1 lb ft)
11.5 N·m (8.5 lb ft)
15.5 N·m (11.4 lb ft)
20 N·m (14.8 lb ft)
25 N·m (18.4 lb ft)
52 N·m (38.4 lb ft)
81 N·m (59.7 lb ft)
112 N·m (82.6 lb ft)
133 N·m (98.1 lb ft)
155 N·m (114.3 lb ft)
180 N·m (132.8 lb ft)
225 N·m (166.0 lb ft)
348 N·m (256.7 lb ft)
Swivel nut torque
25 N·m (18.4 lb ft)
34 N·m (25.1 lb ft)
64 N·m (47.2 lb ft)
132 N·m (97.4 lb ft)
196 N·m (144.6 lb ft)
225 N·m (166.0 lb ft)
255 N·m (188.1 lb ft)
316 N·m (233.1 lb ft)
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