|
| |
Back
Standard Torque Limits in Inch-Pounds for Hose and Tube Coupling Nuts TABLE | Up
TM-55-1520-240-23-1 UH-1H/V and EH-1H Aircraft Manual | Next
SELF-RETAINING BOLTS INSTALLATION |
TM 55-1520-240-23-1
1-13
STANDARD TORQUE LIMIT APPLICATION
(Continued)
1-13
Standard Torque Limits in Inch-Pounds for Pipe Thread Fittings
Be careful when tightening fitting. Overtightening causes distortion, cracking, and leaks.
THREAD SIZE
WORKING TORQUE1
MAXIMUM TORQUE1
1/8-27
100
175
1/4-18
150
300
3/6-18
225
450
TORQUE WRENCHES
30 to 150 Inch-Pounds
100 to 750 Inch-Pounds
1Antiseize compound (E75) shall be used on threads to prevent seizing and to aid in sealing. The compound shall be
applied to the male fitting so that it does not contaminate the fluid in the system. Male and female fittings should be of
different materials.
Bulkhead Fitting Hole Diameter, Washer Thickness, and Nut Torque Limits
Be careful when tightening fittings. Overtightening causes distortion, cracking, and leaks.
TUBE FITTING
BULKHEAD HOLE
DIA (INCH)
WASHER
THICKNESS
TORQUE
(INCH-POUND)
AN924 NUT
TUBE
SIZE
OD (INCH)
THREAD
MIN
MAX
(INCH)
MIN
MAX
-4
1/4
7/16 - 20
.443
.463
.063
85
105
-5
5/16
1/2 - 20
.505
.525
.063
105
125
-6
3/8
9/16 - 16
.568
.588
.063
120
150
-8
1/2
3/4 - 16
.755
.775
.090
240
280
-10
5/8
7/8 - 14
.880
.990
.090
320
380
-12
3/4
1-1/16 - 12
1.068
1.088
.090
500
600
-16
1.0
1-5/16 - 12
1.318
1.338
.090
720
880
-20
1-1/4
1-5/8 - 12
1.630
1.650
.090
960
1200
END OF TASK
1-16
|
