Fabrication and Technical Solutions

he most common types of whitworth thread are: BSPP (G) – British Standard Pipe Parallel BSPT (R/Rp) – British Standard Tapered Pipe, for pipes and tapered thread. An appropriate sealing compound can be used in the thread to ensure a leak-proof joint. If you have any questions please  contact  us or check out our  fittings  with BSPP/ BSPT (G) thread. BSPP (G) Female and Male thread are both parallel. BSPT (R/Rp) Female thread is parallel and male thread is tapered. Female thread can also be tapered: Rc, but this is not common. Thread size (inch) Major diamter (mm) Minor diameter (mm) TPI G 1/16" 7,723 6,561 28 G 1/8" 9,728 8,566 28 G 1/4" 13,157 11,445 19 G 3/8" 16,662 14,950 19 G 1/2" 20,955 18,631 14 G 3/4" 26,441 24,117 14 G 1" 33,249 30,291 11 G 2" 59,614 56,656 11 Male thread size (inch) Female thread size (inch) Major diamter (mm) Minor diamter (mm) TPI R 1/16" Rp 1/16"...

BSW BRITISH STANDARD COARSE PITCH THREAD CHART Whitworth Coarse Thread BS 84 BSW (British Standard Whitworth) British Standard Whitworth Coarse Thread Series (parallel, cylindrical) In GB most common Thread. Corresponds to the Metric Thread in its type of use. THREAD DATA CHART: British Thread (British Standard Whitworth) -- Coarse Pitch Nominal Size Ww 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 Thread Height H1 Tap Drill Diameter mm 1/16" BSW 1.587 0.423 60 1.315 1.050 0.270 1.15 3/32" BSW 2.381 0.529 48 2.041 1.703 0.338 1.90 1/8" BSW 3.175 0.635 40 2.768 2.362 0.406 2.50 5/32" BSW 3.969 0.793 32 3.459 2.952 0.507 3.20 3/16" BSW 4.762 1.058 24 4.084 3.407 0.677 3.70 7/32" BSW 5.556 1.058 24 4.878 4.201 0.677 4.50 1/4" BSW 6.350 1.270 20 5.537 4.724 0.813 5.10 5/16" BSW 7.938 1.411 18 7.034 6.131 0.904 6.50 3/8" BSW 9.525 1.588 16 8.509 7.492 1....

 FINE PITCH (BSF) BRITISH THREAD DATA CHART Whitworth Fine Thread BS 84 British Standard Fine Thread Series (parallel, cylindrical) BSW and BSF are the Thread selections for commercial screws and nuts. This fine thread, which is widespread in the British machine tool industry, is superseded by the American UNF Thread. THREAD DATA CHART: British Thread (British Standard Fine) -- Fine Pitch Nominal Size BSF 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 Thread Height H1 Tap Drill Diameter mm 3/16" BSF 4.763 0.794 32 4.255 3.747 0.508 4.00 7/32" BSF 5.556 0.907 28 4.975 4.394 0.581 4.60 1/4" BSF 6.350 0.977 26 5.725 5.100 0.625 5.30 9/32" BSF 7.142 0.977 26 6.518 5.893 0.625 6.10 5/16" BSF 7.938 1.156 22 7.199 6.459 0.739 6.80 3/8" BSF 9.525 1.27 20 8.712 7.899 0.813 8.30 7/16" BSF 11.113 1.411 18 10.209 9.304 0.904 9.70 1/2" BSF 12.700 1.588 16 11.684 10.66...