TIGHTENING TORQUE 13 c
Description Torque Nm (ft. lbs.) Remarks
Thread for general purposes
(size x pitch) (mm)
6x 1.0
8 x 1.25
10 x 1.25
12 x 1.25
14 x 1.5
16 x 1.5
18 x 1.5
20 x 1.5
22 x 1.5
24 x 1.5
Taper thread for pipes (size)
PT l/8
PT l/4
PT 318
Taper thread for dry sealed pipes
(size)
NPTF l/16
NPTF l/8
NPTF l/4 Head mark @
3.0 to 3.9
7.9 to 12
16 to 23
29 to 43
48 to 70
67 to 100
100 to 150
150 to 190
200 to 260
260 to 320 (2.2 to 2.9)
(5.8 to 8.7)
(12 to 17)
(21 to 32)
(35 to 52)
(51 to 77)
(74 to 110)
(110 to 140)
(150 to 190)
(190 to 240) Head mark @
4.9 to 7.8
13 to 19
27 to 39
47 to 72
77 to 110
130 to 160
180 to 230
160 to 320
340 to 430
420 to 550 (3.6 to 5.8)
(9.4 to 14)
(20 to 29)
(35 to 53)
(57 to 85)
(90 to 120)
(130 to 170)
(190 to 240)
(250 to 320)
(310 to 410)
7.9 to 12
16 to. 19
19 to 30
34 to 45
39 to 54
58 to 73 gt’“l”4:’
(14 t”, 22)
(25 to 33)
(29 to 40)
(43 to 54) Internal thread: Aluminum
Internal thread: Cast iron
Internal thread: Aluminum
Internal thread: Cast iron
Internal thread: Aluminum
Internal thread: Cast iron
4.9 to 7.8
7.9 to 12
7.9 to 12
16 to 19
19 to 30
34 to 45 (14 to 22)
(25 to 33) Internal thread: Aluminum
Internal thread: Cast iron
Internal thread: Aluminum
Internal thread: Cast iron
Internal thread: Aluminum
Internal thread: Cast iron
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