Besly Counterbores - Catalog No. 966

Besly Counterbores
for Socket Head
Cap Screws

High Speed Steel
Straight Shank

Fractional Sizes

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 prices.

Printing Hint: Reduce the text size and turn off background printing before printing this page.

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

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