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Besly
Special Purpose
Interrupted Thread Taps

High Speed Steel
Ground Thread

Spiral Pointed
3 Flute


Fractional Sizes:
1/4 | 5/16 | 3/8

Catalog Number: 4129

Besly Special Purpose Interrupted Thread Taps

These Besly Special Purpose taps are for high production tapping of through holes in nonferrous metals and low carbon steel. The interrupted thread design reduces the incidence of torn threads. They can also be used in titanium and high hardness alloy steels.

Please call 800 435-2965 for current net pricing.

Note: Click the EDP No to check availability.

   
All dimensions are in inches.
  Besly Special Purpose
I
nterrupted Thread Taps
Catl No. 4129
Fractional Sizes
 
   
  Besly Surface Treatments Besly Drill Selector
Tap Size
& TPI
No. of Flutes Chamfer Type P.D. Limits Surface Treat EDP No Pkg Qty Basic Pitch Dia. Overall Length
A
Thread Length
B
Shank Dia.
C
Square Length
D
Square Size
E
1/4-20 3 Plug H3   17298 12 .2175 2-1/2 1 .255 5/16 .191
1/4-28 3 Plug H3   17299 12 .2268 2-1/2 1 .255 5/16 .191
5/16-18 3 Plug H3   17300 12 .2764 2-23/32 1-1/8 .318 3/8 .238
5/16-24 3 Plug H3   17301 12 .2854 2-23/32 1-1/8 .318 3/8 .238
3/8-16 3 Plug H3   17326 12 .3344 2-15/16 1-1/4 .381 7/16 .286
3/8-24 3 Plug H3   17328 12 .3479 2-15/16 1-1/4 .381 7/16 .286
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