TM 5-3805-281-10
Maintenance
SERVICE RECOMMENDATIONS FOR 37
FLARE AND 30 CONE SEAT CONNECTORS
1. Inspect flare and flare seat. They must be free of dirt
or obvious defects.
2. Defects in tube flare cannot be repaired.
Overtightening a defective flared fitting will not stop
leaks.
3. Align tube with fitting before attempting to start nut.
4. Lubricate male threads with hydraulic fluid or petroleum
jelly.
5. Index angle fittings and tighten by hand.
6. Tighten fitting or nut to torque value shown on torque
chart. Do not allow hoses to twist when tightening
fittings.
STRAIGHT FITTING OR SPECIAL NUT TORQUE CHART
Thread Size
Nm
lb-ft
3/8 - 24 UNF
8
6
7/16 - 20 UNF
12
9
1/2 - 20 UNF
16
12
9/16 - 18 UNF
24
18
3/4 - 16 UNF
46
34
7/8 - 14 UNF
62
46
1-1/16 - 12 UN
102
75
1-3/16 - 12 UN
122
90
1-5/16 - 12 UN
142
105
1-5/8 - 12
190
140
1-7/8 - 12 UN
217
160
NOTE: Torque tolerance is 10%.
T82,BHMA,EL
1919MAR961/1
