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 23

Link 2.5MM Co 3Fl 3.0 Pilot X 5.4 Cbore 6.35 Shank X 100 Oal 75-CO-519
Link

2.5MM Co 3Fl 3.0 Pilot X 5.4 Cbore 6.35 Shank X 100 Oal

Zoro # G7639977
Mfr # 75-CO-519
product price:  $80.15
/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 18-20, 10.2 mm 156620 5X10,2
Garant

Interchangeable Pilot Pin for Counterbore 156520 18-20, 10.2 mm

Zoro # G714389665
Mfr # 156620 5X10,2
product price:  $31.79
/ea
Harvey Tool Counterbores-Flat Bottom, 676708-C3, AlTiN, 1/8" Cutter Diameter, 3/4" Flute Length 676708-C3
Harvey Tool

Counterbores-Flat Bottom, 676708-C3, AlTiN, 1/8" Cutter Diameter, 3/4" Flute Length

Zoro # G722920706
Mfr # 676708-C3
product price:  $59.39
/ea
Super Tool Counterbore, 23/32" D, Carbide Tipped 5777188
Super Tool

Counterbore, 23/32" D, Carbide Tipped

Zoro # G0330211
Mfr # 5777188
product price:  $153.99
/ea
Link 8MM Co 3Fl 8.8 Pilot X 13.8 Cbore 7.94 Shank X 100 Oal 75-CO-524
Link

8MM Co 3Fl 8.8 Pilot X 13.8 Cbore 7.94 Shank X 100 Oal

Zoro # G7641246
Mfr # 75-CO-524
product price:  $85.45
/ea
Garant Counterbore Set in a Case, 6 Pieces, Type: DM 156420 DM
Garant

Counterbore Set in a Case, 6 Pieces, Type: DM

Zoro # G409578534
Mfr # 156420 DM
product price:  $200.99
/ea
Tungaloy Solid End Mill Head, VGC157L15.0R03-, PK2 6859506
Tungaloy

Solid End Mill Head, VGC157L15.0R03-, PK2

Zoro # G601779043
Mfr # 6859506
product price:  $105.99
/pk 2, $53.00/ea
Super Tool Counterbore, 11/32" D, Carbide Tipped 5793438
Super Tool

Counterbore, 11/32" D, Carbide Tipped

Zoro # G0330272
Mfr # 5793438
product price:  $117.99
/ea
Link Ua4 #10 English Shcs HSS Counterbore 60-L2-296
Link

Ua4 #10 English Shcs HSS Counterbore

Zoro # G7643784
Mfr # 60-L2-296
product price:  $24.15
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 4-1/2 in

Zoro # G021725804
Mfr # 902-000-319
product price:  $71.89
/ea
Super Tool Counterbore, 27/32" D, Carbide Tipped 5778438
Super Tool

Counterbore, 27/32" D, Carbide Tipped

Zoro # G0330290
Mfr # 5778438
product price:  $136.99
/ea
Super Tool Counterbore, 27/32" D, Carbide Tipped 5798438
Super Tool

Counterbore, 27/32" D, Carbide Tipped

Zoro # G0330187
Mfr # 5798438
product price:  $158.99
/ea
No Product Image Available
Keo

Counterbore Set, 7, Fractional Inch

Zoro # G421725862
Mfr # 902-000-192
product price:  $526.99
/ea
Internal Tool A Nc-453-500 N/C Counterbore 85-4531
Internal Tool

A Nc-453-500 N/C Counterbore

Zoro # G400402364
Mfr # 85-4531
product price:  $174.99
/ea
Link Ua3 #5 English Shcs HSS Counterbore 60-L2-293
Link

Ua3 #5 English Shcs HSS Counterbore

Zoro # G7636118
Mfr # 60-L2-293
product price:  $21.75
/ea
Link 12MM Co 3Fl 12.8 Pilot X 18.8 Cbore 9.53 Shank X 125 Oal 75-CO-526
Link

12MM Co 3Fl 12.8 Pilot X 18.8 Cbore 9.53 Shank X 125 Oal

Zoro # G7641264
Mfr # 75-CO-526
product price:  $108.99
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 7 in

Zoro # G221724652
Mfr # 902-000-298
product price:  $397.99
/ea
Morse Cap Screw Counterbore, Straight Shank, Series 1766, 10 mm Screw, 06496 Bore Dia, 7 Overall Lengt 25751
Morse

Cap Screw Counterbore, Straight Shank, Series 1766, 10 mm Screw, 06496 Bore Dia, 7 Overall Lengt

Zoro # G208029138
Mfr # 25751
product price:  $107.99
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 6 in

Zoro # G321727744
Mfr # 902-000-302
product price:  $185.99
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 7 in

Zoro # G621725389
Mfr # 902-000-297
product price:  $413.99
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 4-1/2 in

Zoro # G821726896
Mfr # 902-000-114
product price:  $64.99
/ea
Super Tool Reduced Shank Counterbore, 11/16" D 52222
Super Tool

Reduced Shank Counterbore, 11/16" D

Zoro # G0331377
Mfr # 52222
product price:  $100.99
/ea
Link 1/4" 3Xd HSS Se .280 X .840 Drill .406 Cbore 3/8 Shank 2-3/4 Oal 50-L2-384
Link

1/4" 3Xd HSS Se .280 X .840 Drill .406 Cbore 3/8 Shank 2-3/4 Oal

Zoro # G7636084
Mfr # 50-L2-384
product price:  $40.25
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 4-1/2 in

Zoro # G221726663
Mfr # 902-000-108
product price:  $62.19
/ea
No Product Image Available
Keo

Counterbore, Metric, 80 mm

Zoro # G421726678
Mfr # 902-000-240
product price:  $69.29
/ea
Internal Tool A Nc-187-187 N/C Counterbore 85-1871
Internal Tool

A Nc-187-187 N/C Counterbore

Zoro # G300402365
Mfr # 85-1871
product price:  $49.39
/ea
Link 4MM Co 3Fl 4.8 Pilot X 7.8 Cbore 6.35 Shank X 100 Oal 75-CO-521
Link

4MM Co 3Fl 4.8 Pilot X 7.8 Cbore 6.35 Shank X 100 Oal

Zoro # G7638839
Mfr # 75-CO-521
product price:  $66.95
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 4-1/2 in

Zoro # G621725921
Mfr # 902-000-317
product price:  $75.89
/ea
Internal Tool A Nc-156-187 N/C Counterbore 85-1561
Internal Tool

A Nc-156-187 N/C Counterbore

Zoro # G500402448
Mfr # 85-1561
product price:  $49.39
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 3 in

Zoro # G821726063
Mfr # 902-000-329
product price:  $58.29
/ea
Internal Tool A Nc-578-625 N/C Counterbore 85-5781
Internal Tool

A Nc-578-625 N/C Counterbore

Zoro # G200402502
Mfr # 85-5781
product price:  $318.99
/ea
Kodiak Cutting Tools No. 4 Counterbores 1/64 Oversize Capscrew Style 5495809
Kodiak Cutting Tools

No. 4 Counterbores 1/64 Oversize Capscrew Style

Zoro # G8615585
Mfr # 5495809
product price:  $44.65
/ea
Link Ua3 #6 English Shcs HSS Counterbore 60-L2-294
Link

Ua3 #6 English Shcs HSS Counterbore

Zoro # G7638769
Mfr # 60-L2-294
product price:  $22.65
/ea
No Product Image Available
Keo

Counterbore, Metric, 71 mm

Zoro # G521727421
Mfr # 902-000-216
product price:  $59.19
/ea
Hhip M3 X 3.4mm HSS 3 Flute Straight Shank Solid Pilot Counterbore 2007-0051
Hhip

M3 X 3.4mm HSS 3 Flute Straight Shank Solid Pilot Counterbore

Zoro # G2468114
Mfr # 2007-0051
product price:  $12.65
/ea
No Product Image Available
Keo

Counterbore, Metric, 80 mm

Zoro # G821726940
Mfr # 902-000-234
product price:  $69.29
/ea
Counterbores (929 items) - Page 23
  • First
  • Previous
  • 23
    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

CountersinksReduced Shank Drill BitsHole SawsSquare End MillsJobber Length Drill Bits
Center DrillsSpiral Flute 3-Flute TapsCarbide End MillsAuger Drill BitsDrill Bit Sets
pilot counterborecleveland counterborecounterbores - flat bottom1-1/4 in counterbore5/8 counterbore
counter bore pilotinterchangeable pilot counterbore6-piece damask jacquard/solidhigh speed steelmetric shcs

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