Besly Logo Besly Slogan  
Tap Pic  
Taps Dies Drills Reamers End Mills Misc Distributor About Us Home

Besly
Counterbores
for Socket Head
Cap Screws

High Speed Steel
Straight Shank

Fractional Sizes:
1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 5/8 | 3/4

Catalog Number: 966

Besly Counterbores for Socket Head Cap Screws

Besly Counterbores are of the solid two lipped type, designed for high production and long life.

With only two cutting lips they are easily sharpened. Their spiral flutes give ample clearance and strength. Cutting like a twist drill, they eliminate chatter.

Please call 800 435-2965 for current net pricing.

Note: Click the EDP No to check availability.

 
All dimensions are in inches.
  Besly Counterbores
for Socket Head
Cap Screws

Catl No. 966
Fractional Sizes
 
 
   
Fractional
Size
EDP No Pkg Qty Pilot
Diameter
A
Cutting
Size
B
Overall
Length
C
Shank
Diameter
D
1/4 22178 1 1/4 3/8 3-5/8 .3125
1/4 22179 1 1/4 13/32 3-5/8 .3125
1/4 22186 1 9/32 13/32 3-5/8 .3125
5/16 22187 1 5/16 7/16 4 .3750
5/16 22188 1 5/16* 15/32 4 .3750
5/16 22189 1 5/16* 1/2 4 .3750
5/16 22196 1 11/32* 15/32 4 .3750
5/16 22197 1 11/32* 1/2 4 .3750
3/8 22198 1 3/8 9/16 4-3/8 .4375
3/8 22199 1 3/8 19/32 4-3/8 .4375
3/8 22206 1 13/32 19/32 4-3/8 .4375
7/16 22207 1 7/16 5/8 4-3/4 .5000
7/16 22208 1 7/16* 21/32 4-3/4 .5000
7/16 22209 1 7/16* 11/16 4-3/4 .5000
7/16 22216 1 15/32* 21/32 4-3/4 .5000
7/16 22217 1 15/32* 11/16 4-3/4 .5000
* For '1960 Series' Socket Head Cap Screws
  Go to the top of the page.
Fractional
Size
EDP No Pkg Qty Pilot
Diameter
A
Cutting
Size
B
Overall
Length
C
Shank
Diameter
D
1/2 22218 1 1/2 3/4 5-1/8 .5625
1/2 22219 1 1/2 25/32 5-1/8 .5625
1/2 22226 1 17/32 25/32 5-1/8 .5625
9/16 22227 1 9/16 13/16 5-5/16 .6250
9/16 22228 1 9/16 7/8 5-5/16 .6250
9/16 22229 1 9/16 27/32 5-5/16 .6250
9/16 22236 1 19/32 27/32 5-5/16 .6250
9/16 22237 1 19/32 7/8 5-5/16 .6250
5/8 22238 1 5/8 7/8 5-1/2 .6250
5/8 22239 1 5/8 29/32 5-1/2 .6250
5/8 22246 1 5/8* 15/16 5-1/2 .6250
5/8 22247 1 5/8* 31/32 5-1/2 .6250
5/8 22248 1 21/32 29/32 5-1/2 .6250
5/8 22249 1 21/32* 31/32 5-1/2 .6250
3/4 22256 1 3/4 1 5-15/16 .7500
* For '1960 Series' Socket Head Cap Screws
  Go to the top of the page.