systems. The BSP thread is offered in a straight (parallel) form known as BSPP and a tapered form known as BSPT. These threads feature a 55° flank angle. Fittings in this section with male BSPP threads use a primary sealing method of an O-ring and retaining ring, as shown in Fig. G5. Fig. G5 — O-Ring with Retaining Ring

BSPP Thread Chart Dimensions: ; Height of Sharp V Thread, H ; Major Diameter of Thread, D (= d) ; Pitch Diameter of Thread, D2 (= d2) ; Minor Diameter of Thread, D1 

Although BSP is a foreign thread, it isn't actually metric. This is why it comes in imperial sizes: 1/8, 1/4, 1/2, 3/4, and so on. BSP parallel threads commonly seal via a 30° chamfer on the male thread to a 30° recessed. When the diameter smaller than 1/4", the value is indicated by a number, like #1 or No.1. 2.Thread sizes in metric are

These threads come in two versions: parallel (BSPP), and tapered (BSPT). The thread 1) Measure the O.D (outer diameter) of the BSP thread.

British Standard Pipe Parallel Thread Chart | BSPP Thread Chart ; 1-1/2, 11, 47.7, 1.88, 45.5 ; 2, 11, 59.5, 2.34, 57.4 

BSPP (G) - British Standard Pipe Parallel and BSPT (R/Rp) – British Standard Tapered Pipe for pipes and tapered threads - G/R/Rp. The Whitworth thread 

Nominal; Diameter Major; Diameter; Inch Major; Diameter; mm Minor Diamter; Nut; mm Ta G 1/16" 0.304 7.722 6.843 6.5 G 1/8" 0.383 9.728 8.848 8.5 G 1/4" 0.518 13.157 11.890 11

Likewise, pipe thread can be parallel (e.g., BSPP). For pipe thread, determine the size by comparing it with a nominal size profile, as shown in Figure 1 (a 

Dash; Size Nominal; Thread Size – t.p.i Basic; depth of thread (h) (in.) ‑1 1/16‑28 .0229 ‑2 1/8‑28 .0229 ‑4 1/4‑19 .0337

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.

BSPT & BSPP Threads Dimensions. Thread size refers to the nominal bore of the pipe. Subtract approx. 1/4″ (6mm) from thread diameter measurement for nominal pipe size. Pitch is Threads Per Inch (TPI). “Gas”, “R” & “G” also refer to BSP. “Male Iron (Pipe)” may be BSP or NPT.

NPT/NPS threads have a 60° included angle and have flattened peaks and valleys (this is a Sellers thread form); BSP threads have a 55° included angle and have rounded peaks and valleys (this is a Whitworth thread form). NPT and BSP thread pitches (threads per inch, TPI) are listed below.

1/16" BSPP 28 0.907 0.581 7.723 7.142 6.561 0 0.107 ‑0.107 ‑0.214 0.282 1/8" BSPP 28 0.907 0.581 9.728 9.147 8.566 0 0.107 ‑0.107 ‑0.214 0.282 1/4" BSPP 19 1.337 0.856 13.157 12.301 11.445 0 0.125 ‑0.125 ‑0.25 0.445 3/8" BSPP 19 1.337 0.856 16.662 15.806 14.95 0 0.125 ‑0.125 ‑0.25 0.445

Nominal Size BSPT Thread Form Type Major Diameter mm d=D Pitch mm p Threads per inch tpi Pitch Diameter mm d2=D2 Minor Diameter Male Thd. d3=D3 Thread Height H1 BSW BSF BSPP BSPF BSPT NPT . Unified Threads 6UN 8UN 12UN 16UN 20UN 28UN 32UN UNC 8UNJ 12UNJ 16UNJ UNF UNEF UNS UNJC UNJF UNJEF. ACME Threads METRIC UNIFIED STUB.

British Standard Pipe fittings are among the most popular of all foreign threads in the world today. These threads come in two versions: parallel (BSPP), 

British Pipe Thread ( Whitworth Form) -- Parallel (BSPP/BSPF). Thread Designation, Nominal Size, Thread Form Type, Major Diameter

27 rows · External thread th. Designation of thread. Number of threads in 25.4 mm. Pitch P. Height of thread h. major d = D. pitch d2 = D2. minor d1 = D1. Lower deviation.

If the diameter stays the same from the first to last thread then the thread is classified as a parallel thread (BSPP). Once it is known whether the thread is 

BSP thread sizes typically are 1 pitch number higher than the NPT threads . I.e. in 1/4" pipe size, the NPT thread is 18 threads /inch; BSP is 19 threads /inch. There are other differences (in thread form for instance) as well. Bottom line is the two don't mate up. I have experience with one size only, 3" nominal.

Nominal; Size; BSPP/BSPF Thread; Form; Type Major; Diameter; mm; d=D Pitch; mm; p Th 1/8" BSPP/BSPF 9.728 0.907 28 1/4" BSPP/BSPF 13.157 1.337 19 3/8" BSPP/BSPF 16.662 1.337 19

Dimensions and pressures for reference only, subject to change. *Class 2A or 2B Table G1 — Thread Conformance Standards The BSP thread is offered in a straight (parallel) form known as BSPP and a tapered form known as BSPT. These threads feature a 55° flank angle. Fittings in this section with

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 /

Typical sizes and uses are : 1/4 Inch BSP - Compressed air connectors. 3/8 Inch BSP - Central heating oil line connectors, some European toilet cistern fill valves (not common in UK). 1/2 Inch BSP - Bathroom basin taps and kitchen sink taps, radiator connections, shower hoses, old outside tap outlets, toilet cistern fill / float valves.

To find the thread size: 1) Measure the O.D (Outer diameter) of the BSP thread. 2) Take the O.D measurement in inches and subtract 1/4 (.25″). For example, a BSP parallel male thread measures out to O.D 1″. Subtracting 1/4 gives a thread size of 3/4 also known as "dash" 12. Once you have the thread size, you then need to determine the.

SIZE TPI MAJOR (EXT) MINOR (INT) TAP DRILL 1/8" 28 9.728 8.566 8.70 1/4" 19 13.157 11.445 11.60 3/8" 19 16.662 14.950 15.00

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.

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.

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

BSPF Threads ( British Standard Pipe Parrallel Fine ) G 1/16" - G 1" G 1 1/8" - G 3" G 3 1/4" - -G 6" Size Thread Designation Major Dia External Thread Internal Thread Tap Drill; Size pitch Class Major Dia Pitch Dia Minor Dia Class Minor Dia BSW BSF BSPP BSPF BSPT NPT . Unified Threads 6UN 8UN 12UN 16UN 20UN 28UN 32UN UNC 8UNJ 12UNJ 16UNJ

BSP Threads Metric tube Metric tube and Metric tube imperial tube Metric tube and imperial tube BSP Parallel (BSPP) male thread BSP parallel port BSP taper Example: metric thread diameter 7 with a pitch of 1 mm = M7x1 There are two types of "Pipe" profile threads: • Parallel (BSPP): these threads fit in matching parallel ports. Sealing is

British Standard Pipe Taper thread (BSPT) whose diameter increases or decreases along the length of the thread. BSPT thread is used where pressure-tightness is made through the mating of two threads together. International standards require all thread is parallel and male thread is tapered.