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 :: Specifications  :: Camera-mount  :: ISO Fine Thread  :: ISO Coarse Thread
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 :: Knuckle Thread DIN  20400  :: Buttress Fine Thread  :: Buttress Coarse Thread  :: Trapezoidal Fine Thread
 :: Trapezoidal Coarse Thread   :: NPT Thread (USA)  :: NPTF Thread (USA)  :: UNC Thread (USA)
 :: UNEF Thread   :: UNF Thread :: 8-UN Thread (USA)  :: 12-UN Thread (USA)
 ::16-UN Thread (USA)  :: Sharp V Thread (USA)  ::BA British Association (GB)  :: BSF Whitworth Fine Thread(GB)
 :: BSW Whitworth Coarse Thread(GB)  :: BSP Whitworth Pipe Thread(GB)  :: BSPT Tapered Whit - worth Pipe Thread(GB)  :: Conversion Inch-Fractals to mm


Whitworth Fine Thread BS 84 BSF threads British Standard Fine Threads

Specifications of International Thread Standards

       British Standard Fine Thread Series (parallel, cylindrical)
BSW and BSF are the Thread selections for commercial screws and nuts. The Fine Thread, which is widespread in the Britisch machine tool industry, is superseded by the American UNF Thread.
Nominal
Diameter
Major
Diameter
Inch
Major
Diameter
mm
Tapping
Drill Size
mm
TPI Pitch
mm
BSF 3/16" 3/16 4,763 3,747 32 0,794
BSF 7/32" 7/32 5,556 4,394 28 0,907
BSF 1/4" 1/4 6,350 5,100 26 0,977
BSF 9/32" 9/32 7,142 5,893 26 0,977
BSF 5/16" 5/16 7,938 6,459 22 1,154
BSF 3/8" 3/8 9,525 7,899 20 1,270
BSF 7/16" 7/16 11,113 9,304 18 1,411
BSF 1/2" 1/2 12,700 10,668 16 1,587
BSF 9/16" 9/16 14,288 12,256 16 1,587
BSF 5/8" 5/8 15,875 13,549 14 1,814
BSF 11/16" 11/16 17,463 15,137 14 1,814
BSF 3/4" 3/4 19,050 16,336 12 2,117
BSF 7/8" 7/8 22,225 19,269 11 2,309
BSF 1" 1 25,400 22,148 10 2,540
BSF 1 1/8" 1 1/8 28,575 24,963 9 2,822
BSF 1 1/4" 1 1/4 31,750 28,138 9 2,822
BSF 1 3/8" 1 3/8 34,925 30,861 8 3,175
BSF 1 1/2" 1 1/2 38,100 34,036 8 3,175
BSF 1 5/8" 1 5/8 41,275 37,211 8 3,175
BSF 1 3/4" 1 3/4 44,450 39,802 7 3,628
BSF 2" 2 50,800 46,152 7 3,628
BSF 2 1/4" 2 1/4 57,150 51,730 6 4,233
BSF 2 1/2" 2 1/2 63,500 58,080 6 4,233
BSF 2 3/4" 2 3/4 69,850 64,430 6 4,233
BSF 3" 3 76,200 69,692 5 5,080
BSF 3 1/4" 3 1/4 82,550 76,042 5 5,080
BSF 3 1/2" 3 1/2 88,900 81,670 4,5 5,644
BSF 3 3/4" 3 3/4 95,250 88,020 4,5 5,644
BSF 4" 4 101,600 94,370 4,5 5,644

Whitworth Fine Thread
 
 

 

© 1998 Conex Metals.

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