RECOMMENDED TORQUES
Form 169007
8
Revision
D
O-RING FACE SEAL (ORFS) HYDRAULIC
FITTINGS
* Torque values and angles shown are based on lubricated
connection, as in re-assembly.
** Always default to the torque value for evaluation of adequate
torque.
*** O-ring face seal type end not defined for this tube size.
a. Check components to ensure that the sealing
surfaces and fitting threads are free of burrs,
nicks, and scratches, or any foreign material.
b. Apply lubricant (typically Petroleum Jelly) to
O-ring and threads. If O-ring is not already
installed, install O-ring. Align the tube or hose
assembly.
c. Ensure that flat face of the mating flange
comes in full contact with O-ring.
d. Thread tube or hose nut until hand-tight. The
nut should turn freely until it is bottomed out.
Torque fitting further to the specified number
of F.F.F.T (“Flats From Finger Tight”), or to a
given torque value in the table shown in the
opposite column.
NOTE
If available, always hold the hex on the
fitting body to prevent unwanted rotation
of fitting body and hose when tightening
the fitting nut.
e. When assembling unions or two hoses
together, three wrenches will be required.
SAE
NO.
THD
SIZE
(in.)
TUB
E
O.D.
(in.)
TORQUE VALUE*
RECOMMENDED
TURNS TO
TIGHTEN (AFTER
FINGER
TIGHTENING)**
ft·lbf N·m
Tube
Nuts
Swivel &
Hose
3 ***
3/16 ---
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4
9/16
1/4
11 - 12
14 - 16
1/4 -1/2
1/2 - 3/4
5 ***
5/16 ---
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6
11/16
3/8
18 - 20
24 - 27
1/4 -1/2
1/2 - 3/4
8
13/16
1/2
32 - 35
43 - 47
10
1
5/8
45 - 51
60 - 68
12
1-3/16
3/4
67 - 71
90 - 95
1/3 -1/2
14
1-3/16
7/8
67 - 71
90 - 95
16
1-7/16
1
93 - 100
125 - 135
20
1-11/16
1-1/4
126 - 141
170 - 190
24
2
1-1/2
148 - 167
200 - 225
32 2-1/2 2
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