TM 5-3895-383-24
Table 4
Inch Taperlock Studs
Thread Size
Inch
Standard Torque
1/4
8 3 Nm (6 2b-ft)
5/16
17 5 Nm (13 4 lb-ft)
3/8
35 5 Nm (26 4 lb-ft)
7/16
45 10 Nm (3 7 lb-ft
1/2
65 10 Nm (48 7 lb-ft)
5/8
110 20 Nm (80 15 lb-ft)
3/4
170 30 Nm (125 22 lb-ft)
7/8
260 40 Nm (190 30 b-ft)
1
400 60 Nm (300 44 lb-ft
1 1/8
525 60 Nm (390 44 b-ft)
1 1/4
750 80 Nm (550 60 lb-fl)
1 3/8
950 125 Nm (700 90 lb-ft)
1 1/2
1200 150 Nm (880 110 lb-ft)
Standard Torque for O-Ring Face
Seal Fittings and 37 Degree
Flared Fittings
SMCS Code: 7553
Illustration 1
(A) O-ring face seal. (B) 37 degree flare. (C) O-ring plug with
a hexagon head. (1) O-ring seal. (2) Hexagon head.
Table 5
Ferrous Straight Thread O-Ring Fitting
Torques for Mating with Ferrous Materials
Outer Diameter
Of the
Nominal Tube
Thread Size
Inch
Standard
Torque
3.18 mm
(.125 inch)
5/16 - 24
5.0 1.5 Nm
(4 1 lb-ft)
4.76 mm
(.188 inch)
3/8 - 24
12 2 Nm
(9 1 lb-ft)
6.35 mm
(.250 inch)
7/16 - 20
22 2 Nm
(16 1 lb-ft)
7.94 mm
(.312 inch)
1/2 - 20
30 3 Nm
(22 2 lb-ft)
9.52 mm
(.375 inch)
9/16 - 18
48 5 Nm
(35 4 lb-ft)
12.70 mm
(.500 inch)
3/4 - 16
82 8 Nm
(60 6 lb-ft)
15.88 mm
(.625 inch)
7/8 - 14
143 15 Nm
(105 11 lb-ft)
19.05 mm
(.750 inch)
1 1/16 - 12
190 20 Nm
(140 15 lb-ft)
22.22 mm
(.875 inch)
1 3/16 - 12
250 25 Nm
(185 18 lb-ft)
25.40 mm
(1.000 inch)
1 5/16 - 12
300 30 Nm
(220 22 lb-ft)
31.75 mm
(1.250 inch)
1 5/8 - 12
350 30 Nm
(260 22 lb-ft)
38.10 mm
(1.500 inch)
1 7/8 - 12
430 40 Nm
(320 30 lb-ft)
50.80 mm
(2.000 inch)
2 1/2 - 12
450 45 Nm
(330 33 lb-ft)
NOTE:
Use 50 percent of the torque values from Table 5
when the fitting, the plug or the port material is
nonferrous.
4-5
