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 TM 55-1905-223-24-3
APPENDIX D - CONT
Table D-2. Torque Values for Tapered Pipe Plugs
Recommended Torque (ft-lb)
NPTF
Lubricated
Size
In Cast Iron or Steel
In Aluminum
1/16-27
8.5 1.0
5.5 0.7
1/8-27
10.5 1.3
6.5 0.8
1/4-18
25 3
16 2
3/8-18
27 3
17 2
1/2-14
50 6
30 4
3/4-14
54 7
34 4
1 -11 1/2
80 10
50 6
1 1/4-11 1/2
85 10
55 7
1 1/2-11 1/2
85 10
55 7
Table D-3. Torque Values for Straight Threaded Tube Fittings,
Hose Fittings, and Plugs with "O-Rings"
For 37 45 and Inverted Flared Fittings PER SAE Standards
,
,
J512, J514, and J516 (See Note)
Nominal
Nominal
Tightening
Torque
Thread
Tube
Torque ft-lb
in-lb Equiv.
od
Size
Nuts & Plugs
5/16
1/8
3.6 0.5
43 6
3/8
3/16
8.6 1.0
103 12
7/16
1/4
12 1.5
144 18
1/2
5/16
15 1.5
180 24
9/16 & 5/8
3/8
18 2
11/16
7/16
25 3
3/4
1/2
30 4
7/8
5/8
40 5
1-1/16
3/4
55 7
1-3/16 & 1-1/4
7/8
65 8
1-5/16 & 1-3/8
1
80 10
1-5/8
1-1/4
100 12
1-7/8
1-1/2
120 15'
2-1/2
2
230 30
NOTE: This chart does not apply to other than the 3 flared designs quoted.
D-2
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