TRW Greenfield 1"-11 NPTF HS Dryseal Tap 3 3/4 Inches Long

Description

NPTF
(National Pipe Thread Fuel).
Comes in a protective cardboard sleeve.
National Pipe Taper Fuel
(
NPTF
), also called
Dryseal American National Standard Taper Pipe Thread
, defined by ASME B1.20.3, is designed to provide a more leak-free seal without the use of PTFE
tape (often referred to by the popular brand name "Teflon") or another sealant compound. NPTF threads have the same basic shape but with crest and root heights adjusted for an interference fit, eliminating the spiral leakage path.
I combine shipping.