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Countersinks - 36 - Blowout Sale! Save up to 51%


Blowout Sale! Up to 51% off on Countersinks at In The National Interest. Top brands include Morse Cutting Tools, HHIP, KEO Cutters, Dormer, Drill America, RedLine Tools, KEO, & Union Butterfield. Hurry! Limited time offers. Offers valid only while supplies last.



Morse Cutting Tools 56142 Chatterless Countersinks, Solid Carbide, Bright Finish, 82 degree Split Point, 6 Flutes, 3/4'' Size
Morse Cutting Tools 56142 Chatterless Countersinks, Solid Carbide, Bright Finish, 82 degree Split Point, 6 Flutes, 3/4" Size
In Stock
$51.99
$49.61
You Save: 5%

mpn: 56142, ean: 0686125561420,

Cutting edge geometry designed to reduce chatter and harmonics. Six flutes allow higher feed rates and provide longer tool life due to distributing the cutting load over a greater number of teeth. The 1/4 diamer is solid carbide. The larger diameters...


Morse Cutting Tools 25690 Chatterless Countersink, M42 8% Cobalt, Titanium Nitride Coated, 6 Flutes, 82 degree Point, 5/8'' Size
Morse Cutting Tools 25690 Chatterless Countersink, M42 8% Cobalt, Titanium Nitride Coated, 6 Flutes, 82 degree Point, 5/8" Size
In Stock
$29.82

mpn: 25690, ean: 0686125256906,

Cutting edge geometry designed to reduce chatter and harmonics. Six flutes allow higher feed rates and provide longer tool life due to distributing the cutting load over a greater number of teeth.List No. 1755. Six Flutes - Tin Coated. M42 8% Cobalt....


Morse Cutting Tools 25558 Machine Countersink, High-Speed Steel, Black Oxide Finish, 82 degree Point, 7/8'' Size
Morse Cutting Tools 25558 Machine Countersink, High-Speed Steel, Black Oxide Finish, 82 degree Point, 7/8" Size
In Stock
$48.44

mpn: 25558, ean: 0686125255589,

Designed for countersinking holes. The longer shank length is ideal for use in turret lathes for screw machine work.List No. 1751. 4 Flutes. Black Oxide. ...


HHIP 5000-2187 60 Degree High Speed Steel Combined Drill and Countersink, 3/16'' Drill Diameter, 7/16'' Body Diameter, 2-3/4'' OAL, 5
HHIP 5000-2187 60 Degree High Speed Steel Combined Drill and Countersink, 3/16" Drill Diameter, 7/16" Body Diameter, 2-3/4" OAL, 5
By HHIP
In Stock
$4.84

mpn: 5000-2187, ean: 0769053052328,

HHIP #5 (3/16" drill diameter) 60 degree combined drill and countersink is made of high speed steel and ground from solid. Plain style. Used for centering work ends, where the work piece is to be revolved on machine centers. 60 degree countersink ang...


Countersink,0 FL,90 Deg,5/16,Cobalt,TiN
Countersink,0 FL,90 Deg,5/16,Cobalt,TiN
In Stock
$75.75

mpn: NA, ean: 7439004833865,

Provide flawless countersinking and deburring. Chatter-free cutting action requires minimal power. Micro-smooth CNC precision ground construction provides clean cutting without smearing on a variety of materials. Through-hole design is easy to reshar...


KEO 55792 Solid Carbide Single-End Countersink, TiALN Coated, 6 Flutes, 82 Degree Point Angle, Round Shank, 3/16'' Shank Diameter, 3/16'' Body Diameter
KEO 55792 Solid Carbide Single-End Countersink, TiALN Coated, 6 Flutes, 82 Degree Point Angle, Round Shank, 3/16" Shank Diameter, 3/16" Body Diameter
In Stock
$46.01

mpn: 55792-TiALN,

KEO 6-flute line of countersinks are companions to our single flute countersinks and our 3- and 4-flute center reamer line. As a rule, the more edges per revolution, the greater amount of material that may be removed. We have designed the 6-flute too...


KEO 55710 Solid Carbide Single-End Countersink, Uncoated (Bright) Finish, Single Flute, 82 Degree Point Angle, Round Shank, 1/8'' Shank Diameter, 1/8'' Body Diameter
KEO 55710 Solid Carbide Single-End Countersink, Uncoated (Bright) Finish, Single Flute, 82 Degree Point Angle, Round Shank, 1/8" Shank Diameter, 1/8" Body Diameter
In Stock
$28.35

mpn: 55710,

KEO single flute countersinks are ideal for chamfering, deburring and countersinking. The large positive rake and single flute construction provide a smooth surface finish on a wide variety of materials. The versatility of this tool should increase p...


Dormer G154 Series High-Speed Steel Single-End Countersink, Uncoated (Bright) Finish, 3 Flutes, 82 Degrees, Round Shank, 8 mm Shank Dia, 12.4 mm Body Dia.
Dormer G154 Series High-Speed Steel Single-End Countersink, Uncoated (Bright) Finish, 3 Flutes, 82 Degrees, Round Shank, 8 mm Shank Dia, 12.4 mm Body Dia.
In Stock
$46.15
$39.15
You Save: 15%

mpn: G15412.4, ean: 7320760149379,

The Dormer G154 series high-speed steel single-end countersink with an uncoated (bright) finish creates an 90-degree conical opening that accepts a flat-head fastener so it sits flush with the surface. The three flutes clear chips away to prevent clo...


KEO 55740 Solid Carbide Single-End Countersink, TiALN Coated, 3 Flutes, 60 Degree Point Angle, Round Shank, 1/8'' Shank Diameter, 1/8'' Body Diameter
KEO 55740 Solid Carbide Single-End Countersink, TiALN Coated, 3 Flutes, 60 Degree Point Angle, Round Shank, 1/8" Shank Diameter, 1/8" Body Diameter
In Stock
$40.61

mpn: 55740-TiALN,

For the carbide family of these tools, the three-flute represents the ideal "general purpose" countersink. They have enough chip clearance in the three-flute design for a variety of ferrous and non-ferrous materials, while providing enough strength w...


Drill America DEWCSK Series High-Speed Steel Center Reamer Countersink, 3 Flute, 3/8'' Shank Diameter, 5/8'' Size, 60 Degrees Angle (Pack of 1)
Drill America DEWCSK Series High-Speed Steel Center Reamer Countersink, 3 Flute, 3/8" Shank Diameter, 5/8" Size, 60 Degrees Angle (Pack of 1)
In Stock
$14.51
$13.00
You Save: 10%

mpn: DEWCSK5/8-60, ean: 0887861131476,

Drill America DEWCSK Series 3 flute countersink is designed for countersinking holes for centers or for enlarge existing holes. High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness fo...


RedLine Tools - #2 Center Drill Carbide Combined Drill Countersink, AlTiN Finish, 2 Flute, 60° Point Angle, 2.0000 OAL - RC37202
RedLine Tools - #2 Center Drill Carbide Combined Drill Countersink, AlTiN Finish, 2 Flute, 60° Point Angle, 2.0000 OAL - RC37202
In Stock
$22.44

mpn: RC37202,

Made in USA. Centering Countersink. used to produce a shallow conical or center hole. ...


KEO 53129-01 Single Flute Countersink, High Speed Steel, 90 Degree Cutting Angle, 1/2'' Body Diameter
KEO 53129-01 Single Flute Countersink, High Speed Steel, 90 Degree Cutting Angle, 1/2" Body Diameter
In Stock
$17.61
$14.81
You Save: 16%

mpn: 53129-01,

KEO single flute countersinks are ideal for chamfering, deburring and countersinking.The versatility of this tool should increase productivity on all general purpose applications. The large positive rake and single flute construction provides a smoot...


KEO Countersink Set 7 PC 6 FL 82 Deg HSS
KEO Countersink Set 7 PC 6 FL 82 Deg HSS
By KEO
In Stock
$164.30

mpn: 1DBU2,

Countersink set single ended number of pieces 7 number of flutes 6 included angle (deg. ) 82 cutting capacity (in. ) - pilot dia (in. ) - pilot length (in. ) - shank dia (in. ) - shank length (in. ) - overall length (in. ) - high speed steel uncoated...


KEO 55750 Solid Carbide Single-End Countersink, TiALN Coated, 3 Flutes, 82 Degree Point Angle, Round Shank, 1/8'' Shank Diameter, 1/8'' Body Diameter
KEO 55750 Solid Carbide Single-End Countersink, TiALN Coated, 3 Flutes, 82 Degree Point Angle, Round Shank, 1/8" Shank Diameter, 1/8" Body Diameter
In Stock
$34.04

mpn: 55750-TiALN,

For the carbide family of these tools, the three-flute represents the ideal "general purpose" countersink. They have enough chip clearance in the three-flute design for a variety of ferrous and non-ferrous materials, while providing enough strength w...


Drill America DEWCSK Series High-Speed Steel Center Reamer Countersink, 3 Flute, 1/4'' Shank Diameter, 3/8'' Size, 90 Degrees Angle (Pack of 1)
Drill America DEWCSK Series High-Speed Steel Center Reamer Countersink, 3 Flute, 1/4" Shank Diameter, 3/8" Size, 90 Degrees Angle (Pack of 1)
In Stock
$11.23
$9.39
You Save: 16%

mpn: DEWCSK3/8-90, ean: 0887861131384,

Drill America DEWCSK Series 3 flute countersink is designed for countersinking holes for centers or for enlarge existing holes. High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness fo...


KEO 55533 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 6 Flutes, 82 Degree Point Angle, Round Shank, 3/4'' Shank Diameter, 1-1/2'' Body Diameter
KEO 55533 Cobalt Steel Single-End Countersink, Uncoated (Bright) Finish, 6 Flutes, 82 Degree Point Angle, Round Shank, 3/4" Shank Diameter, 1-1/2" Body Diameter
In Stock
$124.99
$112.56
You Save: 10%

mpn: 55533,

KEO 6-flute line of countersinks are companions to our single flute countersinks and our 3- and 4-flute center reamer line. As a rule, the more edges per revolution, the greater amount of material that may be removed. We have designed the 6-flute too...


Drill America DEWCSK Series High-Speed Steel Center Reamer Countersink, 3 Flute, 1/2'' Shank Diameter, 3/4'' Size, 100 Degrees Angle (Pack of 1)
Drill America DEWCSK Series High-Speed Steel Center Reamer Countersink, 3 Flute, 1/2" Shank Diameter, 3/4" Size, 100 Degrees Angle (Pack of 1)
In Stock
$18.84
$16.60
You Save: 12%

mpn: DEWCSK3/4-100, ean: 0887861131551,

Drill America DEWCSK Series 3 flute countersink is designed for countersinking holes for centers or for enlarge existing holes. High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness fo...


HHIP 2001-0006 5 Piece Zero-Flute Countersink & Debur Tool Set, 82 Degree
HHIP 2001-0006 5 Piece Zero-Flute Countersink & Debur Tool Set, 82 Degree
By HHIP
In Stock
$48.79

mpn: 2001-0006, ean: 0769053004815,

5 Piece 82 Degree Zero-Flute Countersink & Deburring Tools Set ~ Cam relieved for totally chatter free cuts. ~ Through hole design that is easy to re-sharpen using a small grinding wheel in a cross-hole. ~ Works very well with aluminum, plastics and ...


Drill America DEWCHAT Series High-Speed Steel Chatterless Countersink, 6 Flute, 1/4'' Shank Diameter, 1/2'' Size, 120 Degrees Angle (Pack of 1)
Drill America DEWCHAT Series High-Speed Steel Chatterless Countersink, 6 Flute, 1/4" Shank Diameter, 1/2" Size, 120 Degrees Angle (Pack of 1)
In Stock
$17.17
$16.99
You Save: 1%

mpn: DEWCHAT1/2-120, ean: 0887861132138,

Drill America DEWCHAT Series 6 flute chatterless countersink is designed to provide more metal removal then the 1,2,3, and 4 flute countersinks. They are also more effective on harder materials. High-speed steel tools are good for most general purpos...


Union Butterfield 4603 Series High-Speed Steel Single-End Countersink, Uncoated (Bright) Finish, Single Flute, 90 Degrees, 1/4'' Shank Dia, 1/2'' Body Dia.
Union Butterfield 4603 Series High-Speed Steel Single-End Countersink, Uncoated (Bright) Finish, Single Flute, 90 Degrees, 1/4" Shank Dia, 1/2" Body Dia.
In Stock
$29.40
$14.34
You Save: 51%

mpn: 46031/2X90, ean: 0698464074646,

The Union Butterfield 4603 series high-speed steel single-end countersink with an uncoated (bright) finish creates a 90-degree conical opening that accepts a flat-head fastener so it sits flush with the surface. The single flute quickly cuts through ...



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