Heyco Liquid Tight Cord Grips Torque Recommendations ChartBrass Cord Grips
Heyco® Brass Cordgrips
NPT Thread
Thread Cable Range Lower Part Compression Nut
mm Nm Nm
1/8" NPT 3.0 - 4.0 5 4
4.0 - 6.0 5 2
1/4" NPT 3.5 - 5.0 7 4
5.0 - 6.5 7 5
6.5 - 8.0 7 3
3/8" NPT 3.5 - 4.5 11 7
4.5 - 6.0 11 6
6.0 - 8.0 11 5
8.0 - 10.5 11 3
6.0 - 10.5 11 4
1/2" NPT 6.0 - 8.0 16 10
8.0 - 11.0 16 9
11.0 - 15.0 16 5
8.0 - 15.0 16 5
3/4" NPT 9.5 - 12.5 18 10
12.5 - 16.0 18 10
16.0 - 20.5 18 4
12.5 - 20.5 18 7
1" NPT 14.0 - 17.0 21 5
17.0 - 21.0 21 4
21.0 - 25.5 21 4
17.0 - 25.5 21 6
1-1/4" NPT 20.0 - 24.0 30 10
24.0 - 28.5 30 8
28.5 - 33.0 30 9
24.0 - 33.0 30 12
1-1/2" NPT 29.0 - 33.0 40 11
33.0 - 37.0 40 14
37.0 - 41.0 40 14
33.0 - 41.0 40 22
2" NPT 35.0 - 40.0 48 40
40.0 - 46.0 48 39
46.0 - 52.0 48 33
40.0 - 52.0 48 38
The specified torques for compression nuts are maximum values. These nuts should be tightened until the torque specified in the table is reached OR until the sealing insert protrudes slightly over the compression nut.