TheSociety of Automotive Engineers (SAE) thread standard utilizes a distinctive designation format, including nominal size and threads per inch (TPI). Common SAE thread sizes like 1/4-20, 3/8-16, and 1/2-13 cater to specific applications in
Noteb: Reference dimension. - NPT Thread taper angle = 1/16 taper = 1 deg. 47 min = 0.75 in./ft . - The angle between the sides of the thread is 60 deg. - Thread
R3/4" Female Thread Rc 1/8" Rc 1/4" Rc 3/8" Rc 1/2" Rc 3/4" 10.2 13.6 17.2 21.7 27.1 8.3 11.0 14.5 18.0 23.5: 7.4 11.0 11.0 15.0 16.3 7.4 11.0 11.4 15.0 16.3: G Thread Connection Cylindrical Pipe Thread Connection According to ISO 228/1 (other common descriptions are BSP, R) Male: ie. G 1/4" Female (ISO 1179): ie. G 1/4" Male Thread G 1/8" G 1 MORE NATIONAL PIPE THREADS (NPT) Thread form angle : 60°. The taper rate of national pipe thread : 1 in 16. Height of fundamental triangle. Height of thread. f : depth of truncation at crest or root. L1 : Handtight engagement length. L2 : NPTFstands for “National Pipe Taper Fuel”.It is a tapered pipe thread per ASTM B 1.20.3, derived from the more common NPT standard. It is often referred to as “Dryseal thread”.The tolerances of NPTF are tighter and create a “Metal to Metal” contact between the male and female parts, thus creating a better seal without the need for sealing material.
TheThreaDoctor includes 4 sub-apps: Metric Thread Calculator, UN thread Calculator, NPT thread Calculator, and BSP thread calculator. United Inch Screw Threads Per ASME B1.1. UNC – Coarse pitch thread. UNF – Fine pitch thread. UNEF – Ultra fine pitch thread.
EveryNPT thread has a taper rate of ¾-inch per foot, or 1/16-inch per inch of length. The taper rate is determined by comparing the change in thread diameter over the length of the pipe. The taper angle itself Is 1° 47" 24"" (1.7899°). Manufacturers produce NPT-standard pipes and fittings in these commonly preferred sizes: cs8K.
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  • 3 8 npt thread dimensions in mm