British Standard Whitworth (BSW) Thread Taps

The principal features of the British Standard Whitworth (BSW) thread form are that the angle between the thread flanks is 55 degrees and the thread has radii at both the roots and the crests of the thread.

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1/8" - 40 BSW Thread Tap

1/8" - 40 BSW Thread Tap

3/16" - 24 BSW Thread Tap

3/16" - 24 BSW Thread Tap

1/4" - 20 BSW Thread Tap

1/4" - 20 BSW Thread Tap

5/16" - 18 BSW Thread Tap

5/16" - 18 BSW Thread Tap

3/8" - 16 BSW Thread Tap

3/8" - 16 BSW Thread Tap

7/16" - 14 BSW Thread Tap

7/16" - 14 BSW Thread Tap

1/2" - 12 BSW Thread Tap

1/2" - 12 BSW Thread Tap

9/16" - 12 BSW Thread Tap

9/16" - 12 BSW Thread Tap

5/8" - 11 BSW Thread Tap

5/8" - 11 BSW Thread Tap

3/4" - 10 BSW Thread Tap

3/4" - 10 BSW Thread Tap

7/8" - 9 BSW Thread Tap

7/8" - 9 BSW Thread Tap

1" - 8 BSW Thread Tap

1" - 8 BSW Thread Tap

1-1/8" - 7 BSW Thread Tap

1-1/8" - 7 BSW Thread Tap

1-1/4" - 7 BSW Thread Tap

1-1/4" - 7 BSW Thread Tap

1-3/8" - 6 BSW Thread Tap

1-3/8" - 6 BSW Thread Tap

1-1/2" - 6 BSW Thread Tap

1-1/2" - 6 BSW Thread Tap

2" - 4-1/2 BSW Thread Tap

2" - 4-1/2 BSW Thread Tap