Featured Categories

  • Tools & Machining
  • Shipping, Packaging & Office Supplies
  • Plumbing
  • Safety

Shop Categories

  • Abrasives & Polishers
  • Adhesives & Tapes
  • Electrical Supplies
  • Electronics
  • Fasteners
  • Food Service & Restaurant Supplies
  • Furniture, Linens & Decor
  • Grounds & Outdoor
  • Hardware & Building Materials
  • Heating & Cooling
  • Janitorial & Cleaning Supplies
  • Lab Equipment & Supplies
  • Lighting
  • Material Handling
  • Medical & Personal Care
  • Paint, Coatings & Supplies
  • Plumbing
  • Power Transmission
  • Pumps
  • Raw Materials
  • Safety
  • Shipping, Packaging & Office Supplies
  • Storage & Workspace
  • Test Instruments & Gauges
  • Tools & Machining
  • Vehicle Maintenance
  • Welding, Soldering & Brazing
  • About Us
  • Deals
  • Contact Us
Added to Cart
Skip to Main Content Accessibility Statement
FREE SHIPPING on orders over $50 after you . Restrictions Apply
Zoro Homepage
Close icon
Clipboard Icon Clipboard Icon Quick Order
User Headset Icon User Headset Icon Customer Service
Cart Icon
0
Cart Icon
0
Cart
  • Low prices on everyday needs. Shop Zoro Select
  • Don't miss these limited time offers. Shop All Deals
  • Get 30 days to pay with Net 30. Apply Now
  1. Home
  2. /
  3. Tools & Machining
  4. /
  5. Cutting Tools
  6. /
  7. Porting Tools & Counterbores
  8. /
  9. Counterbores

Counterbores (929 items) - Page 10

Harvey Tool Counterbores - Flat Bottom, 0.2500" (1/4), Flute Length: 7/8" 23416-C3
Harvey Tool

Counterbores - Flat Bottom, 0.2500" (1/4), Flute Length: 7/8"

Zoro # G7151526
Mfr # 23416-C3
product price:  $65.39
/ea
Harvey Tool Counterbores - Flat Bottom 23360
Harvey Tool

Counterbores - Flat Bottom

Zoro # G501019232
Mfr # 23360
product price:  $44.39
/ea
Harvey Tool Counterbores - Flat Bottom, 0.2500" (1/4), Material - Machining: Carbide 23416
Harvey Tool

Counterbores - Flat Bottom, 0.2500" (1/4), Material - Machining: Carbide

Zoro # G7153924
Mfr # 23416
product price:  $64.05
/ea
Cleveland Pilot for Counterbores, 3/32 in, 3/32 in C46538
Cleveland

Pilot for Counterbores, 3/32 in, 3/32 in

Zoro # G4815671
Mfr # C46538
product price:  $25.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.2812" (9/32) 25518-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.2812" (9/32)

Zoro # G7161956
Mfr # 25518-C3
product price:  $142.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.3125" (5/16), Material - Machining: Carbide 25520
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.3125" (5/16), Material - Machining: Carbide

Zoro # G7162428
Mfr # 25520
product price:  $122.99
/ea
Cleveland Pilot for Counterbores, 5/32 in, 5/32 in C46529
Cleveland

Pilot for Counterbores, 5/32 in, 5/32 in

Zoro # G4805433
Mfr # C46529
product price:  $25.89
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1719" (11/64) 25511
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.1719" (11/64)

Zoro # G7257646
Mfr # 25511
product price:  $73.19
/ea
Cleveland Counterbore, 7.000" L, 0.500" dia., Bright C91832
Cleveland

Counterbore, 7.000" L, 0.500" dia., Bright

Zoro # G4878802
Mfr # C91832
product price:  $204.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.7500" (3/4) 23448
Harvey Tool

Counterbores - Flat Bottom, 0.7500" (3/4)

Zoro # G7245466
Mfr # 23448
product price:  $330.99
/ea
Harvey Tool Counterbores - Flat Bottom 23420-C6
Harvey Tool

Counterbores - Flat Bottom

Zoro # G804195442
Mfr # 23420-C6
product price:  $83.45
/ea
Cleveland Counterbore, 3.000" L, 0.250" dia., Bright C91698
Cleveland

Counterbore, 3.000" L, 0.250" dia., Bright

Zoro # G4793831
Mfr # C91698
product price:  $111.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.5625" (9/16), Finish - Machining: AlTiN 23436-C3
Harvey Tool

Counterbores - Flat Bottom, 0.5625" (9/16), Finish - Machining: AlTiN

Zoro # G7157309
Mfr # 23436-C3
product price:  $217.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1094" (7/64) 25507
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.1094" (7/64)

Zoro # G7245204
Mfr # 25507
product price:  $58.69
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1250" (1/8), Neck Dia.: 0.1130" 25508
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.1250" (1/8), Neck Dia.: 0.1130"

Zoro # G7258294
Mfr # 25508
product price:  $59.65
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1562" (5/32) 25510-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.1562" (5/32)

Zoro # G7255415
Mfr # 25510-C3
product price:  $85.09
/ea
Harvey Tool Counterbores - Flat Bottom, 0.1968", Flute Length: 3/4" 2345M
Harvey Tool

Counterbores - Flat Bottom, 0.1968", Flute Length: 3/4"

Zoro # G7242937
Mfr # 2345M
product price:  $61.19
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.0469" (3/64) 25447-C3
Harvey Tool

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

Zoro # G7255887
Mfr # 25447-C3
product price:  $71.89
/ea
Cleveland Port Tool, 2.813" L, 0.250" dia., Bright C46904
Cleveland

Port Tool, 2.813" L, 0.250" dia., Bright

Zoro # G4857470
Mfr # C46904
product price:  $171.99
/ea
Garant Counterbore for Through Holes, 180 Deg, Uncoated, 6.5X3.4 mm 156020 6,5X3,4
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 6.5X3.4 mm

Zoro # G214389462
Mfr # 156020 6,5X3,4
product price:  $24.55
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0394" 2331M
Harvey Tool

Counterbores - Flat Bottom, 0.0394"

Zoro # G7254870
Mfr # 2331M
product price:  $48.79
/ea
Cleveland Pilot for Counterbores, 3/32 in, 3/32 in C46545
Cleveland

Pilot for Counterbores, 3/32 in, 3/32 in

Zoro # G4837152
Mfr # C46545
product price:  $28.85
/ea
Keo Counterbore, 1/64 Clearance, Size 7/16, Co 902-000-026
Keo

Counterbore, 1/64 Clearance, Size 7/16, Co

Zoro # G2216444
Mfr # 902-000-026
product price:  $89.29
/ea
Cleveland Counterbore, 2.062" L, 0.250" dia., Bright C46657
Cleveland

Counterbore, 2.062" L, 0.250" dia., Bright

Zoro # G4795353
Mfr # C46657
product price:  $55.59
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.2969" (19/64) 25519-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.2969" (19/64)

Zoro # G7167109
Mfr # 25519-C3
product price:  $142.99
/ea
Garant Counterbore for Tapping Drill Holes, 180 Deg, Uncoated, 20X10.2 mm 156220 20X10,2
Garant

Counterbore for Tapping Drill Holes, 180 Deg, Uncoated, 20X10.2 mm

Zoro # G114376036
Mfr # 156220 20X10,2
product price:  $50.65
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.2362" 2556M-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.2362"

Zoro # G7164817
Mfr # 2556M-C3
product price:  $115.99
/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:  $81.75
/ea
Keo Counterbore, 1/32 Clearance, Size 7/8, Co 902-000-036
Keo

Counterbore, 1/32 Clearance, Size 7/8, Co

Zoro # G2787671
Mfr # 902-000-036
product price:  $308.99
/ea
Harvey Tool Counterbores - Flat Bottom 23409-C6
Harvey Tool

Counterbores - Flat Bottom

Zoro # G604195383
Mfr # 23409-C6
product price:  $54.15
/ea
Harvey Tool Counterbores - Flat Bottom, 0.2656" (17/64) 23417-C3
Harvey Tool

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

Zoro # G7149575
Mfr # 23417-C3
product price:  $92.45
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.1406" (9/64) 25509
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.1406" (9/64)

Zoro # G7242964
Mfr # 25509
product price:  $61.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.6250" (5/8) 23440
Harvey Tool

Counterbores - Flat Bottom, 0.6250" (5/8)

Zoro # G7158964
Mfr # 23440
product price:  $229.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.1094" (7/64), Shank Dia.: 1/8" 23407
Harvey Tool

Counterbores - Flat Bottom, 0.1094" (7/64), Shank Dia.: 1/8"

Zoro # G7154615
Mfr # 23407
product price:  $48.79
/ea
Cleveland Counterbore, 6.000" L, 0.438" dia., Bright C91709
Cleveland

Counterbore, 6.000" L, 0.438" dia., Bright

Zoro # G4790961
Mfr # C91709
product price:  $139.99
/ea
Cleveland Counterbore, 1.937" L, 0.375" dia., Bright C46669
Cleveland

Counterbore, 1.937" L, 0.375" dia., Bright

Zoro # G4841492
Mfr # C46669
product price:  $58.99
/ea
Counterbores (929 items) - Page 10
  • First
  • Previous
  • 10
    of 26 pages
  • Next
  • Last
How was your search?

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

Jobber Length Drill BitsCountersinksReduced Shank Drill BitsHole SawsSquare End Mills
Carbide End MillsHex DiesRound DiesSpiral Point 2-Flute TapsSpiral Flute 3-Flute Taps
1-1/4 in counterbore5/8 counterborecleveland counterboremetric shcscounter bore
counter bore pilotcounterbores - flat bottominterchangeable pilot counterborehigh speed steelcounter bore set

Sign up and save

Take 10% off your next order when you sign up for Zoro emails. Subscribe now to receive your promo code via email.

Follow us

  • Facebook
  • YouTube
  • LinkedIn
  • Instagram
Every part plays a part

Information

  • About Us
  • Accessibility
  • Careers
  • Inclusion
  • Giving Back
  • Resource Hub
  • Returns
  • Shipping

Shopping

  • Brands
  • Collections
  • My Account
  • Payments
  • Deals
  • Sitemap
  • Track My Order

Services

  • Customer Service
  • FAQs
  • Net 30 Terms
  • Reseller Program
  • Sell on Zoro
  • Participate in Research
  • Tax Exemption

Zoro, Inc

Connect

Customer service from real people

  • Phone: (855) 289-9676
  • Contact Us

© 2011-2026 Zoro Tools, Inc. All rights reserved.
  • Terms & Conditions
  • Terms of Access
  • Privacy Policy
Zoro, Inc