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  1. Home
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  3. Tools & Machining
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  5. Cutting Tools
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  7. Porting Tools & Counterbores
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  9. Counterbores

Counterbores (927 items) - Page 9

Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.0781" (5/64) 25478-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.0781" (5/64)

Zoro # G7242919
Mfr # 25478-C3
product price: 
$71.89
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1181", Shank Dia.: 1/8" 2553M
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.1181", Shank Dia.: 1/8"

Zoro # G7263359
Mfr # 2553M
product price: 
$62.69
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.2656" (17/64) 25517-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.2656" (17/64)

Zoro # G7166436
Mfr # 25517-C3
product price: 
$137.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.4724" 23476-C3
Harvey Tool

Counterbores - Flat Bottom, 0.4724"

Zoro # G7253988
Mfr # 23476-C3
product price: 
$174.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0550" 23355
Harvey Tool

Counterbores - Flat Bottom, 0.0550"

Zoro # G7157564
Mfr # 23355
product price: 
$51.29
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1575" 2554M-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.1575"

Zoro # G7164835
Mfr # 2554M-C3
product price: 
$85.89
/ea
Keo Counterbore, Metric, 100 mm 902-000-249
Keo

Counterbore, Metric, 100 mm

Zoro # G221725697
Mfr # 902-000-249
product price: 
$80.19
/ea
Keo Counterbore, Metric, 80 mm 902-000-234
Keo

Counterbore, Metric, 80 mm

Zoro # G821726940
Mfr # 902-000-234
product price: 
$75.39
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.2656" (17/64) 25517
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.2656" (17/64)

Zoro # G7245439
Mfr # 25517
product price: 
$129.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0937" (3/32) 23393
Harvey Tool

Counterbores - Flat Bottom, 0.0937" (3/32)

Zoro # G7149198
Mfr # 23393
product price: 
$51.29
/ea
Keo Counterbore, Decimal Inch, 3 in 902-000-329
Keo

Counterbore, Decimal Inch, 3 in

Zoro # G821726063
Mfr # 902-000-329
product price: 
$63.39
/ea
Drill America No 12 .215mm Machine Screw Solid Counterbore DEWCBRSOL12
Drill America

No 12 .215mm Machine Screw Solid Counterbore

Zoro # G1739564
Mfr # DEWCBRSOL12
product price: 
$16.25
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0625" (1/16) 23362-C3
Harvey Tool

Counterbores - Flat Bottom, 0.0625" (1/16)

Zoro # G7253050
Mfr # 23362-C3
product price: 
$61.15
/ea
Harvey Tool Counterbores - Flat Bottom, 0.1181" 2343M
Harvey Tool

Counterbores - Flat Bottom, 0.1181"

Zoro # G7161420
Mfr # 2343M
product price: 
$51.29
/ea
Harvey Tool Counterbores - Flat Bottom, 0.1575" 2344M-C3
Harvey Tool

Counterbores - Flat Bottom, 0.1575"

Zoro # G7242928
Mfr # 2344M-C3
product price: 
$58.29
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.0312" (1/32), Shank Dia.: 1/8" 25431
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.0312" (1/32), Shank Dia.: 1/8"

Zoro # G7257244
Mfr # 25431
product price: 
$64.19
/ea
Harvey Tool 0.1750'' Cutter DIA x 0.6250'', 5/8 Flute Length - 4 FL - AlTiN Coated 23574-C3
Harvey Tool

0.1750'' Cutter DIA x 0.6250'', 5/8 Flute Length - 4 FL - AlTiN Coated

Zoro # G813081699
Mfr # 23574-C3
product price: 
$52.19
/ea
Harvey Tool 0.2420'' Cutter DIA x 0.8750'', 7/8 Flute Length - 4 FL 23641
Harvey Tool

0.2420'' Cutter DIA x 0.8750'', 7/8 Flute Length - 4 FL

Zoro # G913081735
Mfr # 23641
product price: 
$66.39
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.2344" (15/64) 25515
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.2344" (15/64)

Zoro # G7252606
Mfr # 25515
product price: 
$101.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.3937" 2550M-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.3937"

Zoro # G7247338
Mfr # 2550M-C3
product price: 
$199.99
/ea
Garant Counterbore for Through Holes, 180 Deg, Uncoated, 18X10.5 mm 156020 18X10,5
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 18X10.5 mm

Zoro # G414389545
Mfr # 156020 18X10,5
product price: 
$45.85
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.2187" (7/32) 25514-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.2187" (7/32)

Zoro # G7264296
Mfr # 25514-C3
product price: 
$114.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.4375" (7/16) 25528-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.4375" (7/16)

Zoro # G7265504
Mfr # 25528-C3
product price: 
$192.99
/ea
Garant Counterbore for Through Holes, 180 Deg, Uncoated, 11X6.4 mm 156020 11X6,4
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 11X6.4 mm

Zoro # G414389675
Mfr # 156020 11X6,4
product price: 
$23.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.0469" (3/64), Number of Flutes: 4 25447
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.0469" (3/64), Number of Flutes: 4

Zoro # G7257795
Mfr # 25447
product price: 
$59.99
/ea
Keo Counterbore, Decimal Inch, 3 in 902-000-084
Keo

Counterbore, Decimal Inch, 3 in

Zoro # G321727010
Mfr # 902-000-084
product price: 
$59.39
/ea
Keo Counterbore, Decimal Inch, 3 in 902-000-093
Keo

Counterbore, Decimal Inch, 3 in

Zoro # G321726655
Mfr # 902-000-093
product price: 
$61.89
/ea
Harvey Tool Counterbores - Flat Bottom, 0.1250" (1/8) 23408
Harvey Tool

Counterbores - Flat Bottom, 0.1250" (1/8)

Zoro # G7153845
Mfr # 23408
product price: 
$51.29
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0469" (3/64) 23347-C3
Harvey Tool

Counterbores - Flat Bottom, 0.0469" (3/64)

Zoro # G7151359
Mfr # 23347-C3
product price: 
$60.15
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0469" (3/64) 23347
Harvey Tool

Counterbores - Flat Bottom, 0.0469" (3/64)

Zoro # G7151474
Mfr # 23347
product price: 
$51.29
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0550" 23355-C3
Harvey Tool

Counterbores - Flat Bottom, 0.0550"

Zoro # G7255659
Mfr # 23355-C3
product price: 
$57.99
/ea
Keo Counterbore, Decimal Inch, 6 in 902-000-304
Keo

Counterbore, Decimal Inch, 6 in

Zoro # G821727848
Mfr # 902-000-304
product price: 
$146.99
/ea
Keo Counterbore, Metric, 80 mm 902-000-237
Keo

Counterbore, Metric, 80 mm

Zoro # G521725885
Mfr # 902-000-237
product price: 
$71.69
/ea
Harvey Tool Counterbores - Flat Bottom, 0.6875" (11/16) 23444-C3
Harvey Tool

Counterbores - Flat Bottom, 0.6875" (11/16)

Zoro # G7258714
Mfr # 23444-C3
product price: 
$410.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1575", Overall Length: 3" 2554M
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.1575", Overall Length: 3"

Zoro # G7164808
Mfr # 2554M
product price: 
$73.19
/ea
Harvey Tool Counterbores - Flat Bottom, 0.2362" 2346M-C6
Harvey Tool

Counterbores - Flat Bottom, 0.2362"

Zoro # G7255850
Mfr # 2346M-C6
product price: 
$81.89
/ea
Counterbores (927 items) - Page 9
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About Counterbores

Counterbores are specialized tools utilized in creating enlarged, flat-bottomed holes in various materials, primarily metal. They're essential when a fastener's head needs to be level with or beneath the surface of the worked material. Available in an array of sizes and shapes, these tools can accommodate diverse types of fasteners and feature different tip configurations like straight flute or spiral flute based on their intended use. Counterboring speeds differ according to the material being processed. These durable tools are typically crafted from high-speed steel (HSS) or cobalt steel for enhanced cutting performance, sometimes coated with titanium nitride (TiN) for superior wear resistance and lubricity when dealing with tougher materials such as stainless steel or aluminum. Industries ranging from automotive manufacturing and aerospace engineering to medical device production widely employ counterbores for precise hole creation necessary for mounting screws and other fasteners.

Related Categories

Hole SawsJobber Length Drill BitsDrill Bit SetsHammer Drill BitsReduced Shank Drill Bits
Center DrillsCountersinksTap SetsAuger Drill BitsHex Dies
pilot counterbore6-piece damask jacquard/solidinterchangeable pilot counterbore5/8 counterborecounter bore pilot
1-1/4 in counterborehigh speed steelcounterbores - flat bottommetric shcscounter bore set

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