Cobalt piloted Countersink, 3 flute piloted countersink, fractional piloted countersinks, detachable piloted countersinks, integral piloted, microstop threaded, solid piloted. BSA Cutting Tools, Southampton, UK.

We have a large range of both metric and imperial countersinks. Rose, 3 flute, single flute and solid piloted countersinks are very popular and we manufacture them in various sizes using the highest quality M35-HSSe with 5% Cobalt to ISO 9001 standard. Thread sizes range from 1/4" - 28". Pilot sizes include 3/32, 1/8, 5/32, 3/16, 7/32 and body diameters include 3/8, 7/16, 1/2".

Fractional Piloted Countersinks 5801/5844

3 Flute Piloted Countersinks

Fractional Piloted Countersinks 5855

Microstop Threaded Piloted Countersinks

Fractional Piloted Countersinks 5801/5844


	D1 inch	D2 inch	D3 inch	L1 inch	L2 inch	kg x1
5801 x 90°	3/32	3/16	3/16	2 1/2	1 3/4	0.008
5805 x 90°	3/32	1/4	3/16	2 1/2	1 3/4	0.010
5802 x 100°	3/32	3/16	3/16	2 1/2	1 3/4	0.008
5806 x 100°	3/32	1/4	3/16	2 1/2	1 3/4	0.010
5804 x 100°	3/32	3/8	3/16	2 1/2	1 3/4	0.012
5803 x 120°	3/32	3/16	3/16	2 1/2	1 3/4	0.008
5807 x 120°	3/32	1/4	3/16	2 1/2	1 3/4	0.010

5809 x 90°	1/8	1/4	3/16	2 1/2	1 3/4	0.010
5816 x 90°	1/8	5/16	3/16	2 1/2	1 3/4	0.012
5825 x 90°	1/8	3/8	3/16	2 1/2	1 3/4	0.012
5810 x 100°	1/8	1/4	3/16	2 1/2	1 3/4	0.010
5817 x 100°	1/8	5/16	3/16	2 1/2	1 3/4	0.012
5811 x 100°	1/8	3/8	3/16	2 1/2	1 3/4	0.012
5812 x 120°	1/8	1/4	3/16	2 1/2	1 3/4	0.010
5818 x 120°	1/8	5/16	3/16	2 1/2	1 3/4	0.012
5826 x 120°	1/8	3/8	3/16	2 1/2	1 3/4	0.012

5820 x 90°	5/32	5/16	3/16	2 1/2	1 3/4	0.012
5827 x 90°	5/32	3/8	3/16	2 1/2	1 3/4	0.012
5821 x 100°	5/32	5/16	3/16	2 1/2	1 3/4	0.012
5823 x 100°	5/32	3/8	3/16	2 1/2	1 3/4	0.012
5822 x 120°	5/32	5/16	3/16	2 1/2	1 3/4	0.012
5828 x 120°	5/32	3/8	3/16	2 1/2	1 3/4	0.012

5830 x 90°	3/16	3/8	3/16	2 1/2	1 3/4	0.012
5831 x 100°	3/16	3/8	3/16	2 1/2	1 3/4	0.012
5832 x 120°	3/16	3/8	3/16	2 1/2	1 3/4	0.012
5834 x 120°	3/16	7/16	3/16	2 1/2	1 3/4	0.017

5835 x 90°	7/32	7/16	3/16	2 1/2	1 3/4	0.012
5837 x 100°	7/32	7/16	3/16	2 1/2	1 3/4	0.012
5838 x 120°	7/32	7/16	3/16	2 1/2	1 3/4	0.017

5840 x 90°	1/4	7/16	3/16	2 1/2	1 3/4	0.017
5843 x 90°	1/4	1/2	3/16	2 1/2	1 3/4	0.018
5841 x 100°	1/4	716	3/16	2 1/2	1 3/4	0.017
5839 x 100°	1/4	1/2	3/16	2 1/2	1 3/4	0.018
5842 x 120°	1/4	7/16	3/16	2 1/2	1 3/4	0.017
5844 x 120°	1/4	1/2	3/16	2 1/2	1 3/4	0.018

Fractional Piloted Countersinks 5855


	D1 inch	D2 inch	D3 inch	L1 inch	L2 inch	kg x1
5855 -3/32-90°	3/32	.170	3/16	2 1/2	1 3/4	0.008
5855 -3/32-100°	3/32	.190	3/16	2 1/2	1 3/4	0.008
5855 -3/32-120°	3/32	.190	3/16	2 1/2	1 3/4	0.008
5855 -1/8-90°	1/8	.228	3/16	2 1/2	1 3/4	0.010
5855 -1/8-100°	1/8	.252	3/16	2 1/2	1 3/4	0.010
5855 -1/8-120°	1/8	.252	3/16	2 1/2	1 3/4	0.010
5855 -5/32-90°	5/32	.275	3/16	2 1/2	1 3/4	0.012
5855 -5/32-100°	5/32	.340	3/16	2 1/2	1 3/4	0.012
5855 -5/32-120°	5/32	.340	3/16	2 1/2	1 3/4	0.012
5855 -3/16-90°	3/16	.360	3/16	2 1/2	1 3/4	0.012
5855 -3/16-100°	3/16	.405	3/16	2 1/2	1 3/4	0.012
5855 -3/16-120°	3/16	.405	3/16	2 1/2	1 3/4	0.012
5855 -1/4-90°	1/4	.470	3/16	2 1/2	1 3/4	0.018
5855 -1/4-100°	1/4	.530	3/16	2 1/2	1 3/4	0.018
5855 -1/4-120°	1/4	.530	3/16	2 1/2	1 3/4	0.018

3 Flute Piloted Countersinks


	D1 mm	D2 mm	D3 mm	L1 mm	L2 mm	kg x1
1866-3.2-6.0-90	3.2f	6.0	5.0	71	14	0.011
1866-3.2-6.3-90	3.2f	6.3	5.0	71	14	0.011
1866-3.4-6.6-90	3.4m	6.6	5.0	71	14	0.011

1866-3.7-7.0-90	3.7f	7.0	5.0	71	14	0.012
1866-3.9-7.6-90	3.9m	7.6	5.0	71	14	0.012

1866-4.3-8.0-90	4.3f	8.0	8.0	80	18	0.027
1866-4.3-8.3-90	4.3f	8.3	8.0	80	18	0.028
1866-4.5-9.0-90	4.5m	9.0	8.0	80	18	0.029

1866-5.3-10.0-90	5.3f	10.0	8.0	80	18	0.031
1866-5.3-10.4-90	5.3f	10.4	8.0	80	18	0.032
1866-5.3-11.0-90	5.5m	11.0	8.0	80	18	0.033

1866-6.4-11.5-90	6.4f	11.5	8.0	80	18	0.032
1866-6.4-12.4-90	6.4f	12.4	8.0	80	18	0.037
1866-6.6-13.0-90	6.6m	13.0	12.5	100	22	0.080

1866-8.4-15.0-90	8.4f	15.0	12.5	100	22	0.085
1866-8.4-16.5-90	8.4f	16.5	12.5	100	22	0.085
1866-9.0-17.2-90	8.4f	17.2	12.5	100	22	0.085

1866-10.5-19-90	10.5f	19.0	12.5	100	22	0.100
1866-10.5-20.5-90	10.5f	20.5	12.5	100	22	0.105
1866-11-21.5-90	11.0m	21.5	12.5	100	22	0.110

Microstop Threaded Countersinks


	D1 mm	D2 mm	D3 mm	No. of Flutes	D4 mm	kg x1
D-2.00-100-10	2.00	2.00	10.00	2	6 x 1	0.010
D-2.38-100-10	2.38	2.00	10.00	2	6 x 1	0.010
D-2.50-100-10	2.50	2.00	10.00	2	6 x 1	0.010
D-2.80-100-10	2.80	2.50	10.00	2	6 x 1	0.010
D-3.00-100-10	3.00	2.50	10.00	2	6 x 1	0.010
D-3.17-100-10	3.17	2.50	10.00	2	6 x 1	0.010
D-3.50-100-10	3.50	3.00	10.00	2	6 x 1	0.014
D-4.00-100-10	4.00	3.50	10.00	2	6 x 1	0.014
D-4.17-100-10	4.17	3.50	10.00	2	6 x 1	0.014
D-4.76-100-14	4.76	4.00	14.00	2	8 x 1	0.025
D-4.83-100-14	4.83	4.00	14.00	2	8 x 1	0.025
D-5.00-100-14	5.00	4.00	14.00	2	8 x 1	0.025
D-5.60-100-14	5.60	4.00	14.00	2	8 x 1	0.025
D-6.00-100-14	6.00	4.00	14.00	2	8 x 1	0.025
D-6.35-100-14	6.35	4.00	14.00	2	8 x 1	0.025
D-7.94-100-17	7.94	5.00	17.00	3	8 x 1	0.030
D-8.00-100-17	8.00	5.00	17.00	3	8 x 1	0.030
D-9.52-100-21	9.52	5.00	21.00	3	8 x 1	0.040
D-10.00-100-21	10.00	5.00	21.00	3	8 x 1	0.040
D-11.11-100-22.20	11.11	6.00	22.20	3	10 x 1	-
D-11.11-100-25.40	11.11	6.00	25.40	3	10 x 1	-
D-12.70-100-28.57	12.70	6.00	28.57	3	10 x 1	-
D-12.70-100-31.75	12.70	6.00	31.75	3	10 x 1	-
D-14.29-100-34.92	14.29	6.00	34.92	3	10 x 1	-
D-15.87-100-38.10	15.87	6.00	38.10	3	10 x 1	-


	D1 mm	D2 mm	No. of Flutes	D3	Rad mm	kg x1
S-2.38-100-10	2.38	10.00	3	6 x 1	0.25 - 0.35	0.010
S-2.40-100-10	2.40	10.00	3	6 x 1	0.25 - 0.35	0.010
S-3.17-100-10	3.17	10.00	3	6 x 1	0.35 - 0.50	0.010
S-3.20-100-10	3.20	10.00	3	6 x 1	0.35 - 0.50	0.010
S-3.50-100-10	3.50	10.00	3	6 x 1	0.35 - 0.50	0.012
S-3.60-100-10	3.60	10.00	3	6 x 1	0.35 - 0.50	0.012
S-3.96-100-10	3.96	10.00	3	6 x 1	0.50 - 0.630	0.012
S-4.00-100-10	4.00	10.00	3	6 x 1	0.50 - 0.630	0.012
S-4.15-100-10	4.15	10.00	3	6 x 1	0.50 - 0.630	0.012
S-4.76-100-10	4.76	10.00	3	6 x 1	0.50 - 0.630	0.014
S-4.80-100-10	4.80	10.00	3	6 x 1	0.50 - 0.630	0.014
S-4.83-100-10	4.83	10.00	3	6 x 1	0.50 - 0.630	0.014
S-5.60-100-10	5.60	10.00	3	6 x 1	0.50 - 0.630	0.014
S-4.76-100-14	4.76	14.00	3	8 x 1	0.630 - 0.750	0.025
S-5.00-100-14	5.00	14.00	3	8 x 1	0.630 - 0.750	0.025
S-5.60-100-14	5.60	14.00	3	8 x 1	0.630 - 0.750	0.025
S-6.00-100-14	6.00	14.00	3	8 x 1	0.630 - 0.750	0.025
S-6.30-100-14	6.30	14.00	3	8 x 1	0.630 - 0.750	0.025
S-6.35-100-14	6.35	14.00	3	8 x 1	0.630 - 0.750	0.025
S-6.40-100-14	6.40	14.00	3	8 x 1	0.630 - 0.750	0.025
S-8.00-100-17	8.00	17.00	3	8 x 1	0.750 - 1.000	0.030
S-9.52-100-21	9.52	21.00	3	8 x 1	0.750 - 1.000	0.045
S-9.60-100-21	9.60	21.00	3	8 x 1	0.750 - 1.000	0.045
S-10.00-100-21.00	10.00	21.00	3	8 x 1	0.750 - 1.000	0.045
S-11.11-100-22.20	11.11	22.20	3	10 x 1	0.750 - 1.000	-
S-12.00-100-25.00	12.00	25.00	3	10 x 1	0.750 - 1.000	-
S-11.11-100-25.40	11.11	25.40	3	10 x 1	0.750 - 1.000	-
S-12.70-100-28.57	12.70	28.57	3	10 x 1	0.750 - 1.000	-
S-14.00-100-30.00	14.00	30.00	3	10 x 1	0.750 - 1.000	-
S-12.70-100-31.75	12.70	31.75	3	10 x 1	0.750 - 1.000	-
S-14.29-100-34.92	14.29	34.92	3	10 x 1	1.000 - 1.100	-
S-15.87-100-38.10	15.87	38.10	3	10 x 1	1.000 - 1.100	-