Screwing Taps:


Hand Taps - BSCY Form and BS Conduit Form

High Speed Steel
Hand Taps - BSCY Form and BS Conduit Form
ISO Metric threads - Ground Threads


BSCY Form

Nominal Diameter Pitch Thread Length Overall Length
1/4 26 1 2.1/2
5/16 26 1.1/8 2.3/4
3/8 26 1.1/4 2.15/16
7/16 26    
1/2 26    
9/16 26 1.1/4 3
5/8 26    
11/16 26    
3/4 26    
7/8 24 1.1/2 3.1/4
1 24    
1.1/8 26    
1.290 24    
1.370 24 1.1/2 4
1.450 26    
1.9/16 24    
1.5/8 24 2 5


Dimensions in mm

Specification conform to BS : 949 - 1951

These Taps are usally Supplied in a set of three - Taper, Second and Bottoming  with Threade Tolerance Zone -3.

BS Conduit Form

Nominal Diameter Pitch Thread Length Overall Length
1/2 18 1.1/4 3
5/8 18 1.1/4 3
3/4 16 1.1/2 3.1/4
1 16 1.1/2 3.1/4
1.1/4 16 1.1/2 4
1.1/2 14 1.1/2 4
2 14 2 5
2.1/2 14 2 5.1/4


Dimensions in mm

Specification conform to BS : 949 - 1951

These Taps are usally Supplied in a set of three - Taper, Second and Bottoming  with Threade Tolerance Zone -3.

 


 
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