TM 5-3895-379-23-2
0284
GENERAL TORQUE VALUES - Continued
Flat Face O-Ring Seal Fittings Service Recommendations - Continued
Table 13.
Stud End O-Ring Seal Torque Values for Straight and Adjustable Fittings* - Continued.
Thread Size
Straight Hex Size
Locknut Hex Size
Straight Fitting or Locknut Torque
inch
inch
inch
lb-ft
Nm
1-1/16-12
1-1/4
1-3/8
130
176
1-3/16-12
1-3/8
1-1/2
170
230
1-5/16-12
1-1/2
1-5/8
210
285
* Torque tolerance is +15 -20%, unless otherwise specified.
O-Ring Face Seal Fittings With SAE Inch Hex Nut and Stud End For High-Pressure Service
Recommendations
1.
Inspect fitting and connector sealing surfaces and the O-rings. They must be free of dirt, scratches, nicks, and
burrs. O-ring must be free of dirt, cuts, cracks, swelling or flatten condition.
2.
Back the stud end hex nut off as far as possible. Push backup washer towards the nut to fully expose the turn
down section. Washer must fit turned down section and not be too loose.
3.
Lubricate O-rings using a thin film of clean oil as needed to hold O-ring in place. Refer to LO 5-3805-294-13.
4.
Install O-ring into groove making sure it is seated at the bottom. Excess oil will prevent seating of O-ring and
cause it to pop out.
5.
To protect an O-ring from threads, wrap electrical tape over the threads. Slide O-ring over the tape into the
turned down section. Remove the tape.
6.
Turn fitting into the boss by hand until face of nut or washer squeezes the O-ring into the seat and contacts
face of boss. Loosen adjustable fittings no more than one turn for alignment.
7.
Hold connections together while tightening nut to ensure O-ring remains in place.
8.
Tighten fitting or nut to torque value shown. Use a second wrench to hold the fitting in position or to keep hose
from twisting while tightening nut.
Bulkhead Union and Nut
90 Degree Adjustable Stud Elbow
90 Degree Swivel Elbow
Straight Stud and Tube Nut
M1333SWR
Figure 18. O-Ring Face Seals.
03/15/2011Rel(1.8)root(torquewp)wpno(M00222)
