Thereare two types of NP threads: NPS: Straight threads, meaning the male and female threads have a constant major diameter or minor diameter across the thread’s length. NPT: The male and female threads are tapered. NPT threads are more commonly used. NPT Thread specifications are based on ANSI B1.20.1 and the thread Thisadapter will convert holes which fit size M20 x 1.5 male threads to a female 1/2" NPT threaded hub. The male end of the adapter also incorporates a Buna-N O-Ring to provide a liquid-tight seal. Constructed of machined aluminum with electro-nickel plating for enhanced protection against corrosion, friction and contamination. 226. * Thread size refers to the nominal bore of the pipe. Subtract approx. 1/4″ (6mm) from thread diameter measurement for nominal pipe size. NPT – NPT : NPT to fixed NPT female sealing is made through direct metal to metal contact. The use of Volz Thread Sealant is recommended. NPT – NPSM : NPT male with conical 30° seat (60 GHT(3/4”) — 1.0625 ODM, 11 1/2 TPI NOTE: Female NPT (Tapered Pipe) thread is not availabe on hose swivel nuts. ODM — Outside Diameter of the Male IDF — Inside Diameter of the Female TPI — Threads per Inch. GHT (3/4”) — 1.0625 ODM, 11 1/2 TPI NOTE: Female NPT (Tapered Pipe) thread is not availabe on hose swivel nuts. 18/2018 NPT Thread Chart - NPT & NPS Fittings Dimensions & Sizes NPT & NPS Threads NPT is NATIONAL PIPE TAPER (AMERICAN) – Thread form per ANSI/ASME B1.20.1 NPS is NATIONAL PIPE STRAIGHT (PARALLEL) – Thread form per ANSI/ASME B1.20.1 NPTF is NATIONAL PIPE TAPER FOR FUEL – Thread form per SAE J476 . Technicalinformation Chart for British Pipe Thread ( Whitworth Form) -- Taper (BSPT). R-Series pipe thread and PT-Series pipe thread. 21/2NPT 19.0 83.0 5.0 40.5 Dimensions NPT–CQ series Thread F A/F + .3 ‐.0 (mm) A Ø (mm) Head depthT (mm) Thread length L (mm) 1/2 NPT 10.0 27.0 5.0 20.0 3/4NPT 10.0 33.0 5.0 20.2 1NPT 10.0 40.0 5.0 25.1 1 1/4NPT 19.0 50.0 5.0 25.7 1 1/2NPT 19.0 54.0 5.0 26.1 2 NPT 19.0 67.0 5. ExternalPipe NPT Thread Dimensional Data Table, Length specification Table for NPT, ANPT, NPTF, NPTR, NPTG and NPTC pipe threads, Mechanical Tolerances for Taper Pipe Threads . Membership Services. External Pipe NPT Thread Dimensional Data Table . Pipe Size. T.P.I. D. O.D. O.D. of Valve . NPT ANPT NPTR NPTF. NPTG. NPTC. 1/16. Features NPT Threaded Ends. Working Pressure: 150lbs (psi) / 10bar. Working Temperature: 250°C at 10bar. Investment lost wax casting manufactured to ISO 9001 : 2015. NPT thread conforms with ASME B1.20.1. Threads are Tapered NPT. Code. NPT Thread = National Pipe Thread • Taper rate for all NPT threads is 1/16 • The taper on NPT threads allows them to form a seal when torqued as the flanks of the threads compress against each other, as opposed to straight thread fittings 60º Pitch 90º conicity: 6.25% Thread Size M6 M8 M10 M12 M16 M20 M25 M32 M40 M50 M63

1 2 npt thread dimensions in mm