TM 5-3805-291-23-2
TORQUE LIMITS - CONTINUED
0234 00
INSTALLATION OF ADJUSTABLE STOR FITTINGS - CONTINUED
N OT E
If fitting is not adjustable, hex bolt/nuts on body replaces locknut. To install this type of fitting, tighten hex
bolt/nuts against face of the mating part.
427-C2069
Table 8. Ferrous Straight Thread O-Ring Fitting Torques for Mating with Ferrous Materials.
Nominal Outer
Thread Size
Standard Torque
Diameter of the Tube
(In.)
.125 in. (3.18 mm)
5/16 - 24
70 9 lb-in. (95 12 Nm)
.188 in. (4.76 mm)
3/8 - 24
9 1 lb-ft (12 1 Nm)
.250 in. (6.35 mm)
7/16 - 20
16 1 lb-ft (22 1 Nm)
.312 in. (7.94 mm)
1/2 - 20
22 2 lb-ft (30 3 Nm)
.375 in. (9.52 mm)
9/16 - 18
35 4 lb-ft (47 5 Nm)
.500 in. (12.70 mm)
3/4 - 16
60 6 lb-ft (81 8 Nm)
.625 in. (15.88 mm)
7/8 - 14
105 10 lb-ft (142 14 Nm)
.750 in. (19.05 mm)
1 1/16 - 12
140 11 lb-ft (190 15 Nm)
.875 in. (22.22 mm)
1 3/16 - 12
185 15 lb-ft (250 20 Nm)
1.000 in. (25.40 mm)
1 5/16 - 12
220 22 lb-ft (298 30 Nm)
1.250 in. (31.75 mm)
1 5/8 - 12
260 26 lb-ft (353 35 Nm)
1.500 in. (38.10 mm)
1 7/16 - 12
305 30 lb-ft (413 40 Nm)
2.000 in. (50.80 mm)
2 1/2 - 12
320 30 lb-ft (434 41 Nm)
Note: Use 50 percent of the torque values from Table 8 when the fitting of the port material is
nonferrous.
0234 00-9
