British Standard Pipe Taper Thread Chart | BSPT Thread Chart ; 3/8, 19, 16.3 ; 1/2, 14, 20.4 ; 5/8, 14, 22.5 ; 3/4, 14, 25.9 

Chart No 4 - British Standard Pipe Threads BSP Threads Dimensions in Inches except where stated Thread Form Data Tapping Drill Clearance Drill Diameter O/Diameter Core Pitch Depth Radius Effective Dia T.P.I Dec / Met / Frac Dec / Met / Frac

POB 1778 Greer, SC 29652 414 West Poinsett Street Greer, SC 29650 [email protected] Ph: 864-848-3993 www.traskinst.com Fax: 864-848-9569 G-SERIES PIPE THREAD (BRITISH STANDARD PIPE PARALLEL

British Standard Pipe(BSPP, BSPF) Thread Form r = Basic Radius = * 137329 p h = Basic Depth of Thread = *640327 p p = Pitch = 1/t.p.i. (Threads per Inch) ISO 228, DIN 259, BS2779, JIS B0202 In Japan this thread is known as (PF) Use prefix G for parallel thread. Example: G1/2 11 /

of BSPP adapters, most all males in series "B" can be used for as a Port Connection with the addition of a bonded seal. Measurement Procedure 1. With calipers, measure the O.D. (outer diameter) of the Male threads or the I.D. (inner diameter) of the threads. 2. Check the thread pitch with the thread pitch gauges. 3.

NPT fittings will have threads with a 60 degree spread while BSP threads will have a 55 degree spread. A manual thread pitch gauge. Use this chart to easily compare NPT and BSP. How to Measure Threads Whether you're working with NPT or BSP fittings, you'll typically be able to tell the difference between tapered and straight connections.

External. Dimensions in inches. BSP. Nominal Threads per. Size inch Thread Dimensions B.S. 2779:1956 Medium Class.

NPTF, BSPT and BSPP measure 1/4" larger than their actual size. For example, a 1/4" NPTF, BSPT or BSPP will actually measure 1/2" on the O. D. of the threads. JIC, SAE O-ring & Flat Face threads measure as listed below. The first number listed is the size of thread, the second number is the threads per inch. Adapter Sizing Chart Thread

Designation of Thread Number of threads in 25.4 mm Pitch (P) Height of thread major (d=D) 1/16 28 0.907 0.581 7.723 1/8 28 0.907 0.581 9.728 1/4 19 1.337 0.856 13.157

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External Pipe Threads per. ISO 228-1, Pipe threads where pressure-tight joints are not made by the threads. These pipe threads are also known as Whitworth pipe threads. Where: D = Major Dia.internal thread D 1 = Minor Dia.internal thread D 2 = Pitch diameter internal thread d = Major Dia.external thread d 1 = Minor Dia.external thread