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
FREE SHIPPING on orders over $50 after you . Restrictions Apply
Zoro Homepage
Close icon
Clipboard Icon Clipboard Icon Quick Order
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
Search Feedback

Counterbores (929 items) - Page 20

Super Tool Reduced Shank Counterbore, 17/32" D 52217
Super Tool

Reduced Shank Counterbore, 17/32" D

Zoro # G0331401
Mfr # 52217
product price:  $85.89
/ea
No Product Image Available
Keo

Counterbore Set, 7, Fractional Inch

Zoro # G321727829
Mfr # 902-000-195
product price:  $526.99
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 5 in

Zoro # G321727607
Mfr # 902-000-310
product price:  $100.99
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 7 in

Zoro # G621725389
Mfr # 902-000-297
product price:  $413.99
/ea
Internal Tool A Nc-609-625 N/C Counterbore 85-6091
Internal Tool

A Nc-609-625 N/C Counterbore

Zoro # G100402503
Mfr # 85-6091
product price:  $317.99
/ea
No Product Image Available
Keo

Counterbore, Metric, 100 mm

Zoro # G421727507
Mfr # 902-000-267
product price:  $102.99
/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 26-30, 19 mm 156620 8X19
Garant

Interchangeable Pilot Pin for Counterbore 156520 26-30, 19 mm

Zoro # G714389580
Mfr # 156620 8X19
product price:  $38.19
/ea
Morse Cap Screw Counterbore, Straight Shank, Series 1766, 6 mm Screw, 04134 Bore Dia, 618 Overall Le 25749
Morse

Cap Screw Counterbore, Straight Shank, Series 1766, 6 mm Screw, 04134 Bore Dia, 618 Overall Le

Zoro # G808029064
Mfr # 25749
product price:  $82.25
/ea
No Product Image Available
Keo

Counterbore, Metric, 71 mm

Zoro # G821727756
Mfr # 902-000-204
product price:  $47.99
/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 15, 6.8 mm 156620 4X6,8
Garant

Interchangeable Pilot Pin for Counterbore 156520 15, 6.8 mm

Zoro # G514389711
Mfr # 156620 4X6,8
product price:  $26.19
/ea
Super Tool Counterbore, 19/32" D, Carbide Tipped 5775938
Super Tool

Counterbore, 19/32" D, Carbide Tipped

Zoro # G0330360
Mfr # 5775938
product price:  $130.99
/ea
Internal Tool A Nc-625-625 N/C Counterbore 85-6251
Internal Tool

A Nc-625-625 N/C Counterbore

Zoro # G500402530
Mfr # 85-6251
product price:  $320.99
/ea
Kodiak Cutting Tools 1/4 Counterbore 1/64 Oversize Capscrew Style 5495864
Kodiak Cutting Tools

1/4 Counterbore 1/64 Oversize Capscrew Style

Zoro # G8614806
Mfr # 5495864
product price:  $51.35
/ea
Hhip 3/4 X 13/16 High Speed Steel 3 Flute Solid  Pilot Counterbore 2007-0034
Hhip

3/4 X 13/16 High Speed Steel 3 Flute Solid Pilot Counterbore

Zoro # G2467956
Mfr # 2007-0034
product price:  $28.25
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 5 in

Zoro # G421726210
Mfr # 902-000-147
product price:  $99.79
/ea
Super Tool Counterbore, 13/16" D, Carbide Tipped 59810
Super Tool

Counterbore, 13/16" D, Carbide Tipped

Zoro # G0330193
Mfr # 59810
product price:  $122.99
/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 18-20, 8.5 mm 156620 5X8,5
Garant

Interchangeable Pilot Pin for Counterbore 156520 18-20, 8.5 mm

Zoro # G614389543
Mfr # 156620 5X8,5
product price:  $31.79
/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
Link 1/4" Co 3Fl 0.281 Pilot X 0.414 Cbore 5/16" Shank X 4" Oal 50-CO-184
Link

1/4" Co 3Fl 0.281 Pilot X 0.414 Cbore 5/16" Shank X 4" Oal

Zoro # G7637317
Mfr # 50-CO-184
product price:  $78.85
/ea
No Product Image Available
Keo

Counterbore, Metric, 100 mm

Zoro # G921727458
Mfr # 902-000-264
product price:  $102.99
/ea
Internal Tool A Nc-297-312 N/C Counterbore 85-2971
Internal Tool

A Nc-297-312 N/C Counterbore

Zoro # G200402403
Mfr # 85-2971
product price:  $77.35
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 5 in

Zoro # G521725823
Mfr # 902-000-141
product price:  $85.89
/ea
Link 7/16" Co 3Fl 0.468 Pilot X 0.695 Cbore 1/2" Shank X 6" Oal 50-CO-187
Link

7/16" Co 3Fl 0.468 Pilot X 0.695 Cbore 1/2" Shank X 6" Oal

Zoro # G7641298
Mfr # 50-CO-187
product price:  $105.99
/ea
Super Tool 1 in. dia. Carbide Tipped Counterbore for Steel, Morse Taper Shank No. 3, 3 flutes 47421
Super Tool

1 in. dia. Carbide Tipped Counterbore for Steel, Morse Taper Shank No. 3, 3 flutes

Zoro # G810744221
Mfr # 47421
product price:  $165.99
/ea
Link #5 HSS Se .138 X .250 Drill .220 Cbore 1/4 Shank 1-7/32 Oal 50-L2-180
Link

#5 HSS Se .138 X .250 Drill .220 Cbore 1/4 Shank 1-7/32 Oal

Zoro # G7642707
Mfr # 50-L2-180
product price:  $18.15
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 7 in

Zoro # G221725512
Mfr # 902-000-174
product price:  $237.99
/ea
Super Tool Counterbore, 11/16" D, Carbide Tipped 59808
Super Tool

Counterbore, 11/16" D, Carbide Tipped

Zoro # G0330257
Mfr # 59808
product price:  $122.99
/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 33-40, 14 mm 156620 10X14
Garant

Interchangeable Pilot Pin for Counterbore 156520 33-40, 14 mm

Zoro # G514389735
Mfr # 156620 10X14
product price:  $45.65
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 4-1/2 in

Zoro # G321726624
Mfr # 902-000-120
product price:  $67.39
/ea
Super Tool Counterbore, 2" D, Carbide Tipped 56428
Super Tool

Counterbore, 2" D, Carbide Tipped

Zoro # G0330248
Mfr # 56428
product price:  $358.99
/ea
Tungaloy Solid End Mill Head, VGC078L08.0R02-, PK2 6859332
Tungaloy

Solid End Mill Head, VGC078L08.0R02-, PK2

Zoro # G401778987
Mfr # 6859332
product price:  $108.99
/pk 2, $54.50/ea
Garant Interchangeable Pilot Pin for Counterbore 156520 24, 8.5 mm 156620 6X8,5
Garant

Interchangeable Pilot Pin for Counterbore 156520 24, 8.5 mm

Zoro # G314389683
Mfr # 156620 6X8,5
product price:  $36.45
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 4-1/2 in

Zoro # G921726406
Mfr # 902-000-313
product price:  $85.39
/ea
Link 7/16" 3Xd HSS Se .468 X 1.404 Drill .688 Cbore 1/2 Shank 4 Oal 50-L2-387
Link

7/16" 3Xd HSS Se .468 X 1.404 Drill .688 Cbore 1/2 Shank 4 Oal

Zoro # G7638778
Mfr # 50-L2-387
product price:  $81.49
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 4-1/2 in

Zoro # G621725426
Mfr # 902-000-315
product price:  $79.15
/ea
No Product Image Available
Keo

Counterbore, Decimal Inch, 4-1/2 in

Zoro # G821726896
Mfr # 902-000-114
product price:  $64.99
/ea
Counterbores (929 items) - Page 20
  • First
  • Previous
  • 20
    of 26 pages
  • Next
  • Last

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

Port ToolsJobber Length Drill BitsHole SawsSquare End MillsHammer Drill Bits
CountersinksSpiral Flute 3-Flute TapsExtra Long Drill BitsReduced Shank Drill BitsHigh Speed Steel Chucking Reamers
counter bore6-piece damask jacquard/solidinterchangeable pilot counterborepilot counterbore5/8 counterbore
metric shcscounterbores - flat bottom1-1/4 in counterborecleveland counterborecounter 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

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