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Besly
Special Purpose
STI Taps

High Speed Steel
Ground Thread

Straight Flute
3 and 4 Flute


Machine Screw Sizes:
4 | 6 | 8 | 10

Fractional Sizes:
1/4 | 5/16 | 3/8 | 7/16 | 1/2

Catalog Number: 4116

Besly Special Purpose STI Taps

These Besly Special Purpose Taps are for production tapping of holes which are to accept screw thread inserts.

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
STI
Taps
Catl No. 4116
Machine Screw 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
4-40 3 Plug H1   15732 12 .1283 2 11/16 .141 3/16 .110
4-40 3 Plug H2   15734 12 .1283 2 11/16 .141 3/16 .110
4-40 3 Bot H1   15733 12 .1283 2 11/16 .141 3/16 .110
4-40 3 Bot H2   15735 12 .1283 2 11/16 .141 3/16 .110
6-32 3 Plug H2   15744 12 .1583 2-3/8 7/8 .141 1/4 .152
6-32 3 Plug H3   15750 12 .1583 2-3/8 7/8 .141 1/4 .152
6-32 3 Bot H2   15745 12 .1583 2-3/8 7/8 .141 1/4 .152
6-32 3 Bot H3   15751 12 .1583 2-3/8 7/8 .141 1/4 .152
8-32 3 Plug H2   15760 12 .1843 2-3/8 15/16 .168 9/32 .165
8-32 3 Plug H3   15762 12 .1843 2-3/8 15/16 .168 9/32 .165
8-32 3 Bot H2   15761 12 .1843 2-3/8 15/16 .168 9/32 .165
8-32 3 Bot H3   15763 12 .1843 2-3/8 15/16 .168 9/32 .165
10-24 3 Plug H2   15764 12 .2170 2-1/2 1 .255 5/16 .191
10-24 3 Plug H3   15770 12 .2170 2-1/2 1 .255 5/16 .191
10-24 3 Bot H2   15765 12 .2170 2-1/2 1 .255 5/16 .191
10-24 3 Bot H3   15771 12 .2170 2-1/2 1 .255 5/16 .191
10-32 3 Plug H2   15772 12 .2103 2-1/2 1 .255 5/16 .191
10-32 3 Plug H3   15774 12 .2103 2-1/2 1 .255 5/16 .191
10-32 3 Bot H2   15773 12 .2103 2-1/2 1 .255 5/16 .191
10-32 3 Bot H3   15775 12 .2103 2-1/2 1 .255 5/16 .191
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All dimensions are in inches.
  Besly Special Purpose
STI
Taps
Catl No. 4116
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 H2   15784 12 .2825 2-22/32 1-1/8 .318 3/8 .238
1/4-20 3 Plug H3   15790 12 .2825 2-22/32 1-1/8 .318 3/8 .238
1/4-20 3 Bot H2   15785 12 .2825 2-22/32 1-1/8 .318 3/8 .238
1/4-20 3 Bot H3   15791 12 .2825 2-22/32 1-1/8 .318 3/8 .238
1/4-28 3 Plug H2   15792 12 .2732 2-22/32 1-1/8 .318 3/8 .238
1/4-28 3 Plug H3   15794 12 .2732 2-22/32 1-1/8 .318 3/8 .238
1/4-28 3 Bot H2   15793 12 .2732 2-22/32 1-1/8 .318 3/8 .238
1/4-28 3 Bot H3   15795 12 .2732 2-22/32 1-1/8 .318 3/8 .238
5/16-18 4 Plug H3   15800 12 .3486 2-15/16 1-1/4 .381 7/16 .286
5/16-18 4 Bot H3   15801 12 .3486 2-15/16 1-1/4 .381 7/16 .286
5/16-24 4 Plug H2   15804 12 .3395 2-15/16 1-1/4 .381 7/16 .286
5/16-24 4 Plug H3   15810 12 .3395 2-15/16 1-1/4 .381 7/16 .286
5/16-24 4 Plug H2   15805 12 .3395 2-15/16 1-1/4 .381 7/16 .286
5/16-24 4 Bot H3   15811 12 .3395 2-15/16 1-1/4 .381 7/16 .286
3/8-16 4 Plug H3   15812 12 .4156 3-3/8 1-21/32 .367 7/16 .275
3/8-16 4 Bot H3   15813 12 .4156 3-3/8 1-21/32 .367 7/16 .275
3/8-24 4 Plug H2   15820 12 .4020 3-5/32 1-7/16 .323 13/32 .242
3/8-24 4 Plug H3   15822 12 .4020 3-5/32 1-7/16 .323 13/32 .242
3/8-24 4 Bot H2   15821 12 .4020 3-5/32 1-7/16 .323 13/32 .242
3/8-24 4 Bot H3   15823 12 .4020 3-5/32 1-7/16 .323 13/32 .242
7/16-14 4 Plug H3   15824 12 .4839 3-19/32 1-21/32 .429 1/2 .322
7/16-14 4 Bot H3   15825 12 .4839 3-19/32 1-21/32 .429 1/2 .322
7/16-20 4 Plug H3   15832 12 .4700 3-3/8 1-21/32 .367 7/16 .275
7/16-20 4 Bot H3   15833 12 .4700 3-3/8 1-21/32 .367 7/16 .275
1/2-13 4 Plug H3   15840 12 .5499 3-13/16 1-13/16 .480 9/16 .360
1/2-13 4 Bot H3   15841 12 .5499 3-13/16 1-13/16 .480 9/16 .360
1/2-20 4 Plug H3   15844 12 .5325 3-19/32 1-13/32 .429 1/2 .322
1/2-20 4 Bot H3   15845 12 .5325 3-19/32 1-21/32 .429 1/2 .322
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