Port Connections

Assembly of taperd thread port connections

NPT/NPTF Thread

ANSI/ASME 1.20.1-1983

Tightening of NPT/NPTF thread
Size Thread T
NPT/F
Assembly
TFFT
Turns
4 1/8-27 NPT/F 2.0-3.0
6 1/4-18 NPT/F 2.0-3.0
8 3/8-18 NPT/F 2.0-3.0
10 1/2-14 NPT/F 2.0-3.0
12 3/4-14 NPT/F 2.0-3.0
16 1-11 1/2 NPT/F 1.5-2.5
20 1 1/4-11 1/2 NPT/F 1.5-2.5
24 1 1/2-11 1/2 NPT/F 1.5-2.5