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 Support
0
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 (927 items) - Page 3

Super Tool Counterbore, 5/16" D, Carbide Tipped 56402
Super Tool

Counterbore, 5/16" D, Carbide Tipped

Zoro # G0330412
Mfr # 56402
product price: 
$99.65
/ea
Super Tool Counterbore, 25/32" D, Carbide Tipped 5777812
Super Tool

Counterbore, 25/32" D, Carbide Tipped

Zoro # G0330281
Mfr # 5777812
product price: 
$133.99
/ea
Super Tool Counterbore, 7/16" D, Carbide Tipped 56404
Super Tool

Counterbore, 7/16" D, Carbide Tipped

Zoro # G0330123
Mfr # 56404
product price: 
$108.99
/ea
Link 3/8" HSS Se .406 X .468 Drill .593 Cbore 5/8 Shank 2-11/32 Oal 50-L2-186
Link

3/8" HSS Se .406 X .468 Drill .593 Cbore 5/8 Shank 2-11/32 Oal

Zoro # G7645017
Mfr # 50-L2-186
product price: 
$30.15
/ea
Super Tool Counterbore, 11/16" D, Carbide Tipped 56408
Super Tool

Counterbore, 11/16" D, Carbide Tipped

Zoro # G0330047
Mfr # 56408
product price: 
$113.99
/ea
Hhip 5/16 X 11/32 High Speed Steel 3 Flute Solid  Pilot Counterbore 2007-0020
Hhip

5/16 X 11/32 High Speed Steel 3 Flute Solid Pilot Counterbore

Zoro # G2467904
Mfr # 2007-0020
product price: 
$18.29
/ea
Link 8MM HSS Se 8.73 X 11.11 Drill 13.49 Cbore 11.11 Shank 46.04 Oal 75-L2-524
Link

8MM HSS Se 8.73 X 11.11 Drill 13.49 Cbore 11.11 Shank 46.04 Oal

Zoro # G7643809
Mfr # 75-L2-524
product price: 
$29.75
/ea
Hhip No 8 X 11/64" High Speed Steel 3 Flute Solid Pilot Counterbore 2007-0008
Hhip

No 8 X 11/64" High Speed Steel 3 Flute Solid Pilot Counterbore

Zoro # G2468053
Mfr # 2007-0008
product price: 
$14.79
/ea
Hhip 6 Piece High Speed Steel 3 Flute Solid  Pilot Counterbore Set 2007-0003
Hhip

6 Piece High Speed Steel 3 Flute Solid Pilot Counterbore Set

Zoro # G2468148
Mfr # 2007-0003
product price: 
$212.99
/ea
Harvey Tool 0.4375 in. 7/16 Cutter dia. x 1 in. 1 Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated 731628-C3
Harvey Tool

0.4375 in. 7/16 Cutter dia. x 1 in. 1 Carbide Flat Bottom Counterbore, 4 Flutes, AlTiN Coated

Zoro # G511325422
Mfr # 731628-C3
product price: 
$146.99
/ea
Harvey Tool 3/16 Cutter dia. x .75  in. 3/4 Flute Length Carbide Flat Bottom Counterbore, 4 Flutes 23412-C8
Harvey Tool

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

Zoro # G711326403
Mfr # 23412-C8
product price: 
$58.19
/ea
Garant Counterbore for Through Holes, 180 Deg, Uncoated, 10X5.5 mm 156020 10X5,5
Garant

Counterbore for Through Holes, 180 Deg, Uncoated, 10X5.5 mm

Zoro # G114389555
Mfr # 156020 10X5,5
product price: 
$21.49
/ea
Drill America 3/16" X 3/32" Pilots for Counterbore DEWPIL3/16X3/32
Drill America

3/16" X 3/32" Pilots for Counterbore

Zoro # G1746780
Mfr # DEWPIL3/16X3/32
product price: 
$6.25
/ea
Sold in mult. of 2 for $12.50
Harvey Tool Counterbores - Flat Bottom, 0.3281" (21/64) 23421
Harvey Tool

Counterbores - Flat Bottom, 0.3281" (21/64)

Zoro # G7148604
Mfr # 23421
product price: 
$94.39
/ea
Harvey Tool Counterbores - Flat Bottom, 0.0625" (1/16) 23362
Harvey Tool

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

Zoro # G7242858
Mfr # 23362
product price: 
$51.29
/ea
Harvey Tool Counterbores - Flat Bottom, 0.3125" (5/16) 23420-C3
Harvey Tool

Counterbores - Flat Bottom, 0.3125" (5/16)

Zoro # G7155096
Mfr # 23420-C3
product price: 
$95.69
/ea
Keo Counterbore, 1/32 Clearance, Size 3/4, Co 902-000-035
Keo

Counterbore, 1/32 Clearance, Size 3/4, Co

Zoro # G3346673
Mfr # 902-000-035
product price: 
$244.99
/ea
Harvey Tool Counterbores - Flat Bottom, 0.3437" (11/32) 23422-C3
Harvey Tool

Counterbores - Flat Bottom, 0.3437" (11/32)

Zoro # G7157135
Mfr # 23422-C3
product price: 
$115.99
/ea
Drill America No 10 .189mm Machine Screw Solid Counterbore DEWCBRSOL10
Drill America

No 10 .189mm Machine Screw Solid Counterbore

Zoro # G1743999
Mfr # DEWCBRSOL10
product price: 
$13.65
/ea
Garant Counterbore for Tapping Drill Holes, 180 Deg, Uncoated, 18X8.5 mm 156220 18X8,5
Garant

Counterbore for Tapping Drill Holes, 180 Deg, Uncoated, 18X8.5 mm

Zoro # G414375555
Mfr # 156220 18X8,5
product price: 
$44.59
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.3750" (3/8), Flute Length: 1" 25524-C3
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.3750" (3/8), Flute Length: 1"

Zoro # G7262126
Mfr # 25524-C3
product price: 
$166.99
/ea
Drill America No 8 .163mm Machine Screw Solid Counterbore DEWCBRSOL8
Drill America

No 8 .163mm Machine Screw Solid Counterbore

Zoro # G1739695
Mfr # DEWCBRSOL8
product price: 
$13.29
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.4375" (7/16) 25528
Harvey Tool

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

Zoro # G7262756
Mfr # 25528
product price: 
$170.99
/ea
Harvey Tool Counterbores - Flat Bottom - Long Reach, 0.3750" (3/8), Number of Flutes: 4 25524
Harvey Tool

Counterbores - Flat Bottom - Long Reach, 0.3750" (3/8), Number of Flutes: 4

Zoro # G7260297
Mfr # 25524
product price: 
$144.99
/ea
Drill America 5/8" X 5/16" Pilots for Counterbore DEWPIL5/8X5/16
Drill America

5/8" X 5/16" Pilots for Counterbore

Zoro # G1745496
Mfr # DEWPIL5/8X5/16
product price: 
$12.75
/ea
Keo Counterbore, Close Fit, Size 3/8, Cobalt 902-000-022
Keo

Counterbore, Close Fit, Size 3/8, Cobalt

Zoro # G2453586
Mfr # 902-000-022
product price: 
$91.89
/ea
Keo Counterbore, 1/32 Clearance, Size No 6, Co 902-000-009
Keo

Counterbore, 1/32 Clearance, Size No 6, Co

Zoro # G1198321
Mfr # 902-000-009
product price: 
$66.15
/ea
Keo Counterbore, 1/64 Clearance, Size 5/8, Co 902-000-032
Keo

Counterbore, 1/64 Clearance, Size 5/8, Co

Zoro # G3372582
Mfr # 902-000-032
product price: 
$142.99
/ea
Keo Counterbore, 1/32 Clearance, Size 5/8, Co 902-000-033
Keo

Counterbore, 1/32 Clearance, Size 5/8, Co

Zoro # G1975653
Mfr # 902-000-033
product price: 
$177.99
/ea
Super Tool Counterbore, 15/16" D, Carbide Tipped 56412
Super Tool

Counterbore, 15/16" D, Carbide Tipped

Zoro # G0329959
Mfr # 56412
product price: 
$158.99
/ea
Super Tool Counterbore, 1-1/8" D, Carbide Tipped 56415
Super Tool

Counterbore, 1-1/8" D, Carbide Tipped

Zoro # G0329940
Mfr # 56415
product price: 
$144.99
/ea
Super Tool Counterbore, 5/8" D, Carbide Tipped 56407
Super Tool

Counterbore, 5/8" D, Carbide Tipped

Zoro # G0330010
Mfr # 56407
product price: 
$112.99
/ea
Super Tool Counterbore, 15/16" D, Carbide Tipped 59812
Super Tool

Counterbore, 15/16" D, Carbide Tipped

Zoro # G0330220
Mfr # 59812
product price: 
$153.99
/ea
Hhip No 10 X 13/64" High Speed Steel 3 Flute Solid Pilot Counterbore 2007-0010
Hhip

No 10 X 13/64" High Speed Steel 3 Flute Solid Pilot Counterbore

Zoro # G2467947
Mfr # 2007-0010
product price: 
$13.65
/ea
Link Ua7-16MM Metric Shcs HSS Counterbore 72-L2-518
Link

Ua7-16MM Metric Shcs HSS Counterbore

Zoro # G7645884
Mfr # 72-L2-518
product price: 
$58.99
/ea
Super Tool Counterbore, 1-1/4" D, Carbide Tipped 56417
Super Tool

Counterbore, 1-1/4" D, Carbide Tipped

Zoro # G0330108
Mfr # 56417
product price: 
$163.99
/ea
Counterbores (927 items) - Page 3
  • First
  • Previous
  • 3
    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

Hole SawsJobber Length Drill BitsReduced Shank Drill BitsCountersinksTap Sets
Square End MillsAuger Drill BitsDrill Bit SetsCenter DrillsHex Dies
cleveland counterborecounter bore pilot5/8 counterborepilot counterboreinterchangeable pilot counterbore
high speed steelmetric shcs1-1/4 in counterbore6-piece damask jacquard/solidcounter 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