Countersinks

These countersinks are primarily for use on portable drills and clamp to the center drill with a set screw. Available in 3/8 to 3/4" for center drills sized 1/8 to 3/8".

Additional countersinks can be found in our Drill Bits for Boring Machines section.

Southeast Tool
Clamp-on Countersink, 16mm Dia for 5mm Drill, Southeast Tool CSP1605RH
Carbide tipped countersink clamps on to the spiral of a 5mm drill and cuts up to a 16mm countersink.…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $13.99

Was:

Now: $12.12
Southeast Tool
Clamp-on Countersink, 16mm Dia for 5mm Drill, Southeast Tool CSP1605LH
Carbide tipped countersink clamps on to the spiral of a 5mm drill and cuts up to a 16mm countersink.…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $13.99

Was:

Now: $12.12
Southeast Tool
Clamp-on Countersink, 16mm Dia for 4mm Drill, Southeast Tool CSP1604RH
Carbide tipped countersink clamps on to the spiral of a 4mm drill and cuts up to a 16mm countersink.…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $13.99

Was:

Now: $12.12
Southeast Tool
Clamp-on Countersink, 16mm Dia for 4mm Drill, Southeast Tool CSP1604LH
Carbide tipped countersink clamps on to the spiral of a 4mm drill and cuts up to a 16mm countersink.…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $13.99

Was:

Now: $12.12
Southeast Tool
Clamp-on Countersink, 5mm-10mm Dia for 5mm-10mm Drill, Southeast Tool CSH20510RH
Carbide tipped countersink clamps on to the spiral of a 5mm to 10mm drill and cuts up to a 5mm to 10…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $15.30

Was:

Now: $13.24
Southeast Tool
Clamp-on Countersink, 5mm-10mm Dia for 5mm-10mm Drill, Southeast Tool CSH20510LH
Carbide tipped countersink clamps on to the spiral of a 5mm to 10mm drill and cuts up to a 5mm to 10…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $15.30

Was:

Now: $13.24
Southeast Tool
Clamp-on Countersink, 11mm-12mm Dia for 11mm-12mm Drill, Southeast Tool CSH201112RH
Carbide tipped countersink clamps on to the spiral of a 11mm to 12mm drill and cuts up to a 11mm to …

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $15.30

Was:

Now: $13.24
Southeast Tool
Clamp-on Countersink, 11mm-12mm Dia for 11mm- 12mm Drill, Southeast Tool CSH201112LH
Carbide tipped countersink clamps on to the spiral of a 11mm to 12mm drill and cuts up to a 11mm to …

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $15.30

Was:

Now: $13.24
Triumph Twist Drill
Center Reamer/Countersink, 3-Flute, 1" Dia, Triumph 039464
Triumph 039464 - Center Reamer/Countersink, 3-Flute, 1in Dia., 82deg Point, 1/2in Shank, 3in Overall…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $124.20

Was:

Now: $73.81
Triumph Twist Drill
Center Reamer/Countersink, 3-Flute, 3/4" Dia, Triumph 039420
Triumph 039420 - Center Reamer/Countersink, 3-Flute, 3/4in Dia., 82deg Point, 1/2in Shank, 2 5/8in O…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $64.27

Was:

Now: $38.19
Triumph Twist Drill
Center Reamer/Countersink, 3-Flute, 5/8" Dia, Triumph 039419
Triumph 039419 - Center Reamer/Countersink, 3-Flute, 5/8in Dia., 82deg Point, 3/8in Shank, 2 1/4in O…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $48.60

Was:

Now: $28.88
Triumph Twist Drill
Center Reamer/Countersink, 3-Flute, 1/2" Dia, Triumph 039418
Triumph 039418 - Center Reamer/Countersink, 3-Flute, 1/2in Dia., 82deg Point, 3/8in Shank, 2in Overa…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $33.66

Was:

Now: $20.00
Triumph Twist Drill
Center Reamer/Countersink, 3-Flute, 3/8" Dia, Triumph 039417
Triumph 039417 - Center Reamer/Countersink, 3-Flute, 3/8in Dia., 82deg Point, 1/4in Shank, 1 3/4in O…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $26.09

Was:

Now: $15.51
Triumph Twist Drill
Center Reamer/Countersink, 3-Flute, 1/4" Dia, Triumph 039416
Triumph 039416 - Center Reamer/Countersink, 3-Flute, 1/4in Dia., 82deg Point, 3/16in Shank, 1 1/2in …

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $22.08

Was:

Now: $13.11
Wiha
HSS 1/4" Drive 90deg Countersink Bit 8.3mm, Wiha 78617
Wiha 78617 - HSS 1/4in. Drive 90deg Countersink Bit 8.3x35mm for M4/2.0mm. High quality HSS steel, g…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $18.92

Was:

Now: $16.53
Wiha
HSS 1/4" Drive 90deg Countersink Bit 6.3mm, Wiha 78615
Wiha 78615 - HSS 1/4in. Drive 90deg Countersink Bit 6.3x35mm for M3/1.5mm. High quality HSS steel, g…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $18.92

Was:

Now: $16.53
Wiha
HSS 1/4" Drive 90deg Countersink Bit 20.5mm, Wiha 78624
Wiha 78624 - HSS 1/4in. Drive 90deg Countersink Bit 20.5x35mm for M10/3.5mm. High quality HSS steel,…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $30.48

Was:

Now: $26.62
Wiha
HSS 1/4" Drive 90deg Countersink Bit 16.5mm, Wiha 78622
Wiha 78622 - HSS 1/4in. Drive 90deg Countersink Bit 16.5x35mm for M8/3.2mm. High quality HSS steel, …

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $27.76

Was:

Now: $24.25
Wiha
HSS 1/4" Drive 90deg Countersink Bit 12.4mm, Wiha 78621
Wiha 78621 - HSS 1/4in. Drive 90deg Countersink Bit 12.04x35mm for M6/2.8mm. High quality HSS steel,…

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $25.16

Was:

Now: $21.98
Wiha
HSS 1/4" Drive 90deg Countersink Bit 10.4mm, Wiha 78619
Wiha 78619 - HSS 1/4in. Drive 90deg Countersink Bit 10.4x35mm for M5/2.5mm. High quality HSS steel, …

MSRP:

Was:

Now: (Inc. Tax)

MSRP: $21.86

Was:

Now: $19.09

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