Screwing Tapes:


High Speed Steel Parallel Pipe Taps - BSP and NPS


High Speed Steel
Parallel Pipe Taps - BSP and NPS
Ground Thread


B S P British Standard Pipe Parallel (G- Series)


Nominal Diameter Pitch Thread Length Overall Length
1/8 28 15 59
1/4 19 19 67
3/8 19 21 75
1/2 14 26 87
5/8 14 26 92
3/4 14 28 96
7/8 14 29 102
1 11 33 109
1.1/8 11 34 115
1.1/4 11 36 119
1.1/2 11 37 125
1.3/4 11 39 132
2 11 41 140
2.1/4 11 42 142
2.1/2 11 45 153
2.3/4 11 46 160
3 11 48 164
3.1/2 11 50 173
4 11 53 185

Dimensions in mm / Inches

Specification conform to BS : 949 - 1982

These Taps are usally Supplied in a set of three - Taper, Second and Bottoming.


NPS - American National Standard Straight Pipe Thread


Nominal Diameter Pitch Thread Length Overall Length
1/8 27 2.1/8 0.4375
1/4 18 2.1/16 0.5625
3/8 18 2.9/16 0.7000
1/2 14 3.1/4 0.9063
1 11.1/2 3.3/4 1.1250


Dimensions in mm.

Specification conform to BS : 949 - 1971

Dimensions also applicable for NPSC and NPSM Taps.



 
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