BSW Threads - Whitworth

 

The BSW Thread (British Standard Whitworth) is the British Standard thread.

 

BSW Threads Chart

Thread

Sizes

Thread Pitch

(mm)

outer diameter

(mm)

Core Hole diameter

(mm)

Gear number

pro Inch

 W 1/16" 0,423 1,588 1,15 60
 W 3/32" 0,529 2,381 1,85 48
 W 1/8" 0,635 3,175 2,55 40
 W 5/32" 0,794 3,969 3,20 32
 W 3/16" 1,058 4,763 3,70 24
 W 7/32" 1,058 5,556 4,50 24
 W 1/2" 2,117 6,350 10,50 12
 W 9/16" 2,117 7,940 12,00 12
 W 5/8" 2,309 9,525 13,50 11
 W 3/4" 2,540 11,113 16,50 10
 W 7/8" 2,822 22,225 19,25 9
 W 1" 3,175 25,400 22,00 8
 W 1 1/8" 3,628 28,575 24,75 7
 W 1 1/4" 3,628 31,750 27,75 7
 W 1 3/8" 4,233 34,925 30,50 6
 W 1 1/2" 4,233 38,100 33,50 6
 W 1 5/8" 5,080 41,275 35,50 6
 W 1 3/4" 5,080 44,450 39,00 5
 W 1 7/8" 5,644 47,625 41,50 4 1/2
 W 2" 5,644 50,800 44,50 4 1/2
 W 2 1/4" 6,350 57,150 50,00 4
 W 2 1/2" 6,350 63,500 56,50 4
 W 2 3/4" 7,257 69,850 62,00 3 1/2
 W 3" 7,257 76,200 68,00 3 1/2
 W 3 1/4" 7,815 82,550 74,00 3 1/4
 W 3 1/2" 7,815 88,900 80,50 3 1/4
 W 3 3/4" 8,467 95,250 86,00 3
 W 4" 8,467 101,600 92,50 3

* All information without guarantee.

Tip !

Pipe thread Sealing cord or sealing tape.