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Pipe Fuel Thread datasheet. This page provided the thread dimensions of 3/8 - 18 NPTF. NPTF stands for National Pipe Thread Fuel, based on ASTM B1.20.3. It is also called Dryseal Pipe Thread. It is a variation of the more popular NPT thread standard based on ASTM B1.20.1.
NPTF stands for National Pipe Tapered Fuel. . The basic profile is identical to the common NPT thread. The main difference is that NPTF provides a leakproof seal without using a sealant. It is obtained by tight tolerances and gauging requirements that create interference fitting in all conditions.
NPTF (National Pipe Tapered Fuel) red thread for fuels. This is used for both. male and female ends. This connection is still widely used in fluid power systems, even through it is not recommended by the National Fluid Power Association (N.F.P.A.) for use in h. draulic applications. The NPTF male will mate with the NPTF.
Fig.18 NPTF Pipe Assembly Method A. Installation Torque 1. Inspect components for damage or contamination. 2. Lubricate or apply compatible sealant to male pipe thread. See Fig. 18. 3. Screw fitting into port until hand tight. For shape fittings, take note of the intended alignment of the mating connectors. 4.
Tap Drill Charts | National Pipe Threads NPT & NPTF NPS & NPSF Pipe Tap Size Pitch (TPI) Drill Size* (inch) Pitch (TPI) Drill Size (inch) 1/16 27 0.242 (C) - - 1/8 27 0.332 (Q) 27 0.348 (S) 1/4 18 7/16 18 29/64 3/8 18 9/16 18 19/32 1/2 14 45/64 14 47/64 3/4 14 29/32 14 15/16 1 11-1/2 1-9/64 11-1/2 1-3/16 1-1/4 11-1/2 1-31/64 11-1/2 1-33/64
Description. General Purpose spiral point tap series that provides exceptional value for all general threading applications. Features & Benefits. HSS material Increased wear resistance. NPT & NPTF For standard and dry seal tapered pipe thread applications. Bright, Steam Oxide surface treatment S/O increases mechanical lubricity.
National Pipe Tapered Fuel (NPTF) The male and female threads connect and a seal is formed when the two are mated together (i.e. threads deformation). This is known as a dry seal thread. If additional sealing is required, teflon and pipe dope can be applied.
