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  1. Home
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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 11

Garant Counterbore for Through Holes, 180 Deg, Uncoated, 6.5X3.2 mm 156020 6,5X3,2
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 6.5X3.2 mm

Zoro # G514389612
Mfr # 156020 6,5X3,2
product price: 
$24.55
/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: 
$44.15
/ea
Garant Counterbore for Through Holes, 180 Deg, Uncoated, 20X13.5 mm 156020 20X13,5
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 20X13.5 mm

Zoro # G714389573
Mfr # 156020 20X13,5
product price: 
$47.19
/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: 
$23.15
/ea
Garant Counterbore for Through Holes, 180 Deg, Uncoated, 15X9 mm 156020 15X9
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 15X9 mm

Zoro # G314389669
Mfr # 156020 15X9
product price: 
$36.99
/ea
Harvey Tool Counterbores - Flat Bottom 23360
Harvey Tool

Counterbores - Flat Bottom

Zoro # G501019232
Mfr # 23360
product price: 
$48.89
/ea
Harvey Tool 0.1181 in. 3 mm Cutter dia. x 3/8 in. Carbide Flat Bottom Counterbore, 4 Flutes, TiB2 Coated 2343M-C8
Harvey Tool

0.1181 in. 3 mm Cutter dia. x 3/8 in. Carbide Flat Bottom Counterbore, 4 Flutes, TiB2 Coated

Zoro # G411324723
Mfr # 2343M-C8
product price: 
$58.49
/ea
Harvey Tool 5/16 Cutter dia. x 1 in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated 731620-C3
Harvey Tool

5/16 Cutter dia. x 1 in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated

Zoro # G911325350
Mfr # 731620-C3
product price: 
$90.99
/ea
Drill America No 6 .137mm Machine Screw Solid Counterbore DEWCBRSOL6
Drill America

No 6 .137mm Machine Screw Solid Counterbore

Zoro # G1741357
Mfr # DEWCBRSOL6
product price: 
$14.49
/ea
Harvey Tool 1/2  in. Cutter dia. x 1  in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 731632-C3
Harvey Tool

1/2 in. Cutter dia. x 1 in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G811325351
Mfr # 731632-C3
product price: 
$186.99
/ea
Harvey Tool 3/8  in. Cutter dia. x 1  in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 731624-C3
Harvey Tool

3/8 in. Cutter dia. x 1 in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G011325380
Mfr # 731624-C3
product price: 
$118.99
/ea
Harvey Tool 0.1250 in. 1/8 Cutter dia x 1/2 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 731608
Harvey Tool

0.1250 in. 1/8 Cutter dia x 1/2 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G911324988
Mfr # 731608
product price: 
$54.79
/ea
Harvey Tool 0.3750 in. 3/8 Cutter dia x 1.0000 in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 731624
Harvey Tool

0.3750 in. 3/8 Cutter dia x 1.0000 in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G011325595
Mfr # 731624
product price: 
$102.99
/ea
Keo Counterbore Set, 7, Fractional Inch 902-000-294
Keo

Counterbore Set, 7, Fractional Inch

Zoro # G021724876
Mfr # 902-000-294
product price: 
$647.99
/ea
Harvey Tool 0.3125 in. 5/16 Cutter dia x 1.00in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 731620
Harvey Tool

0.3125 in. 5/16 Cutter dia x 1.00in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G011325267
Mfr # 731620
product price: 
$86.29
/ea
Keo Counterbore Set, 7, Fractional Inch 902-000-292
Keo

Counterbore Set, 7, Fractional Inch

Zoro # G621726478
Mfr # 902-000-292
product price: 
$647.99
/ea
Harvey Tool Counterbores - Flat Bottom 23320-C3
Harvey Tool

Counterbores - Flat Bottom

Zoro # G601020039
Mfr # 23320-C3
product price: 
$59.59
/ea
Harvey Tool 0.4375 in. 7/16 Cutter dia x 1.00in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 731628
Harvey Tool

0.4375 in. 7/16 Cutter dia x 1.00in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G911325404
Mfr # 731628
product price: 
$114.99
/ea
Harvey Tool 0.5000 in. 1/2 Cutter dia x 1.0000 in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 731632
Harvey Tool

0.5000 in. 1/2 Cutter dia x 1.0000 in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G011325441
Mfr # 731632
product price: 
$164.99
/ea
Keo Counterbore Set, 7, Fractional Inch 902-000-189
Keo

Counterbore Set, 7, Fractional Inch

Zoro # G321726334
Mfr # 902-000-189
product price: 
$573.99
/ea
Harvey Tool 1/16 Cutter dia. x 1/4 in. Flute Length Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated 731562-C3
Harvey Tool

1/16 Cutter dia. x 1/4 in. Flute Length Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated

Zoro # G711325017
Mfr # 731562-C3
product price: 
$63.19
/ea
Harvey Tool 1/8 in. Cutter dia. x 1/2 in. Flute Length Carbide Flat Bottom Counterbore, 4 Flutes, TiB2 Coated 23408-C8
Harvey Tool

1/8 in. Cutter dia. x 1/2 in. Flute Length Carbide Flat Bottom Counterbore, 4 Flutes, TiB2 Coated

Zoro # G711326410
Mfr # 23408-C8
product price: 
$58.49
/ea
Harvey Tool 5/32 Cutter dia. x 0.6250 in. 5/8 Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated 731610-C3
Harvey Tool

5/32 Cutter dia. x 0.6250 in. 5/8 Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated

Zoro # G411325119
Mfr # 731610-C3
product price: 
$61.15
/ea
Harvey Tool 0.2187 in. 7/32 Cutter dia. x 3/4 Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated 731614-C3
Harvey Tool

0.2187 in. 7/32 Cutter dia. x 3/4 Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated

Zoro # G011325229
Mfr # 731614-C3
product price: 
$79.89
/ea
Harvey Tool Counterbores - Flat Bottom 23360-C3
Harvey Tool

Counterbores - Flat Bottom

Zoro # G901019412
Mfr # 23360-C3
product price: 
$58.49
/ea
Harvey Tool 3/8 in. Cutter dia. x 1 in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes, TiB2 Coated 23424-C8
Harvey Tool

3/8 in. Cutter dia. x 1 in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes, TiB2 Coated

Zoro # G211324640
Mfr # 23424-C8
product price: 
$115.99
/ea
Harvey Tool 0.0625 in. 1/16 Cutter dia x 0.25in. 1/4 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 731562
Harvey Tool

0.0625 in. 1/16 Cutter dia x 0.25in. 1/4 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G811325023
Mfr # 731562
product price: 
$54.79
/ea
Harvey Tool 0.0394 in. 1 mm Cutter dia. x 0.1560 in. 5/32 Carbide Flat Bottom Counterbore, 4 Flutes 2331M-C8
Harvey Tool

0.0394 in. 1 mm Cutter dia. x 0.1560 in. 5/32 Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G311326391
Mfr # 2331M-C8
product price: 
$58.79
/ea
Harvey Tool 1/4 in. Cutter dia. x7/8 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes, TiB2 Coated 23416-C8
Harvey Tool

1/4 in. Cutter dia. x7/8 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes, TiB2 Coated

Zoro # G111324603
Mfr # 23416-C8
product price: 
$78.59
/ea
Harvey Tool 1/2 in. Cutter dia. x 1 in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes, TiB2 Coated 23432-C8
Harvey Tool

1/2 in. Cutter dia. x 1 in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes, TiB2 Coated

Zoro # G811324668
Mfr # 23432-C8
product price: 
$176.99
/ea
Harvey Tool Counterbores - Flat Bottom 23380-C3
Harvey Tool

Counterbores - Flat Bottom

Zoro # G201018894
Mfr # 23380-C3
product price: 
$60.15
/ea
Harvey Tool 0.0937 in. 3/32 Cutter dia x 3/8 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 731593
Harvey Tool

0.0937 in. 3/32 Cutter dia x 3/8 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G511325064
Mfr # 731593
product price: 
$54.79
/ea
Harvey Tool 3/16 Cutter dia. x .75 in. 3/4 Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated 731612-C3
Harvey Tool

3/16 Cutter dia. x .75 in. 3/4 Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated

Zoro # G011325069
Mfr # 731612-C3
product price: 
$61.15
/ea
Harvey Tool 0.2812 in. 9/32 Cutter dia x 0.875 in. 7/8 Flute Length Carbide Flat Bottom Counterbore 731618
Harvey Tool

0.2812 in. 9/32 Cutter dia x 0.875 in. 7/8 Flute Length Carbide Flat Bottom Counterbore

Zoro # G211325203
Mfr # 731618
product price: 
$86.29
/ea
Harvey Tool 0.3437 in. 11/32 Cutter dia x 1.00in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 731622
Harvey Tool

0.3437 in. 11/32 Cutter dia x 1.00in. 1 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes

Zoro # G611325346
Mfr # 731622
product price: 
$102.99
/ea
Harvey Tool 0.0937 in. 3/32 Cutter dia. x 3/8 in. Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated 731593-C3
Harvey Tool

0.0937 in. 3/32 Cutter dia. x 3/8 in. Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated

Zoro # G411325058
Mfr # 731593-C3
product price: 
$63.29
/ea
Counterbores (927 items) - Page 11
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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 BitsReduced Shank Drill BitsCountersinksTap Sets
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high speed steelmetric shcs1-1/4 in counterbore6-piece damask jacquard/solidcounter bore set

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