Email: sales@a1tooling.com | Phone: (888) 988-8820
We ship from multiple warehouses throughout the USA
to get you what you need as fast as possible!
Millions of items in stock!
Fast online checkout - No account required
Cart 0
Cart 0

Holemaking Products - Counterbores & Porting Tools For Sale | A1 Tooling - (1669 Products)

Value Collection - 6 Piece, 3 Flutes, Straight Shank, Interchangeable Pilot Counterbore Set - A1 Tooling

Value Collection - 6 Piece, 3 Flutes, Straight Shank, Interchangeable Pilot Counterbore Set


Item #: 08794018
Brand: Value Collection
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Straight shanks are used for general purpose applications. The shank is smaller than the drill bit diameter. They are used with portable drills and drill presses on ferrous and non-ferrous materials.
Product Specifications
Number of Flutes 3
Counterbore Material High Speed Steel
Aircraft-Style No
Finish/Coating Bright
Fastener Size Compatibility (Inch) 3/16; 1/4; 5/16; 3/8; 7/16; 1/2
Number of Pieces 6
Shank Type Straight
Standard or Oversize Pilot Standard
Storage Unit Type Block
Storage Unit Material Wood

$266.71

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

APT - 1/2" Cutting Diam, 3/32" Thick Blade, 5/16" Fastener Compatibility, Forward Cutting, Blade Type Counterbore Blade - A1 Tooling

APT - 1/2" Cutting Diam, 3/32" Thick Blade, 5/16" Fastener Compatibility, Forward Cutting, Blade Type Counterbore Blade


Item #: 08863730
Brand: APT
Model #: BB16

Product Specifications
Fastener Type Compatibility Socket-Head Cap Screw
Fastener Size Compatibility (Inch) 5/16
Cutting Diameter (Inch) 1/2
Cutting Direction Forward
Blade Thickness (Inch) 3/32
Blade Material High Speed Steel

$36.22

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Union Butterfield - 1" Head Diam, 1/2" Shank Diam, Counterbore Pilot - A1 Tooling

Union Butterfield - 1" Head Diam, 1/2" Shank Diam, Counterbore Pilot


Item #: 65707192
Brand: Union Butterfield
Model #: 3210202

Product Specifications
Head Diameter (Inch) 1
Shank Diameter (Inch) 1/2
Finish/Coating Bright
Aircraft-Style No
Pilot Material High Speed Steel

$127.04

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Value Collection - 9/16" Head Diam, 3/16" Shank Diam, Counterbore Pilot - A1 Tooling

Value Collection - 9/16" Head Diam, 3/16" Shank Diam, Counterbore Pilot


Item #: 08904369
Brand: Value Collection
Model #:

Product Specifications
Head Diameter (Inch) 9/16
Shank Diameter (Inch) 3/16
Pilot Material Carbon Steel

$15.30

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Cleveland - 1/4" Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore - A1 Tooling

Cleveland - 1/4" Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore


Item #: 81852261
Brand: Cleveland
Model #: C92705

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic.
Product Specifications
Fastener Type Compatibility Socket-Head Cap Screw
Counterbore Diameter (Inch) 13/32
Fastener Size Compatibility (Inch) 1/4
Counterbore Material High Speed Steel
Finish/Coating Bright
Standard or Oversize Pilot Standard
Shank Diameter (Inch) 3/8
Number of Flutes 3
Aircraft-Style No
Pilot Diameter (Inch) 9/32
Shank Type Straight
Overall Length (mm) 146.05
Overall Length (Inch) 5-3/4
Overall Length (Decimal Inch) 5.75
Cutting Direction Forward
Material Application Alloy Tool Steel; Carbon Steel; Cast Iron

$118.30

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Keo - 10mm Socket Head Cap Screw Compatible, Cobalt, Solid Pilot Counterbore - A1 Tooling

Keo - 10mm Socket Head Cap Screw Compatible, Cobalt, Solid Pilot Counterbore


Item #: 44850709
Brand: Keo
Model #: 56218

Features and Benefits

Cobalt is harder than high speed steel and provides better wear resistance. It is commonly used on high tensile alloys.
Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic.
Product Specifications
Fastener Type Compatibility Socket-Head Cap Screw
Counterbore Diameter (mm) 18.00
Fastener Size Compatibility (mm) 10.00
Counterbore Material Cobalt
Finish/Coating Bright
Standard or Oversize Pilot Standard
Shank Diameter (mm) 12.50
Number of Flutes 3
Pilot Diameter (mm) 8.50
Overall Length (mm) 100.00

$74.86

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Made in USA - #5 Wire Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore - A1 Tooling

Made in USA - #5 Wire Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore


Item #: 08272684
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic.
Product Specifications
Fastener Type Compatibility Socket-Head Cap Screw
Counterbore Diameter (Decimal Inch) 0.2210
Fastener Size Compatibility (Wire) #5
Counterbore Material High Speed Steel
Finish/Coating Bright
Standard or Oversize Pilot Standard
Shank Diameter (Inch) 3/16
Number of Flutes 4
Aircraft-Style No
Pilot Diameter (Decimal Inch) 0.1400
Shank Type Straight
Overall Length (Inch) 4-1/8
Cutting Direction Forward

$40.90

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Made in USA - #10 to #4 Wire Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore Set - A1 Tooling

Made in USA - #10 to #4 Wire Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore Set


Item #: 08273039
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Straight shanks are used for general purpose applications. The shank is smaller than the drill bit diameter. They are used with portable drills and drill presses on ferrous and non-ferrous materials.
Product Specifications
Fastener Type Compatibility Socket-Head Cap Screw
Minimum Fastener Size Compatibility (Inch) 1/4
Minimum Fastener Size Compatibility (Wire) #10
Maximum Fastener Size Compatibility (Wire) #4
Maximum Fastener Size Compatibility (Inch) 1/2
Standard or Oversize Pilot Oversize
Number of Flutes 3
Counterbore Material High Speed Steel
Finish/Coating Bright
Fastener Size Compatibility (Wire) #4; #5; #6; #8; #10
Fastener Size Compatibility (Inch) 1/4; 5/16; 3/8; 7/16; 1/2
Number of Pieces 10
Shank Type Straight
Cutting Direction Forward
Oversize Increment (Inch) 1/64
Storage Unit Type Case
Storage Unit Material Wood
Aircraft-Style No

$448.24

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Made in USA - 4mm Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore - A1 Tooling

Made in USA - 4mm Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore


Item #: 01569995
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic.
Product Specifications
Fastener Type Compatibility Socket-Head Cap Screw
Counterbore Diameter (mm) 8.00
Fastener Size Compatibility (mm) 4.00
Counterbore Material High Speed Steel
Finish/Coating Bright
Standard or Oversize Pilot Standard
Shank Diameter (Inch) 3/8
Shank Diameter (mm) 9.53
Number of Flutes 3
Aircraft-Style No
Pilot Diameter (mm) 4.50
Shank Type Straight
Overall Length (mm) 88.90
Overall Length (Decimal Inch) 3.50
Cutting Direction Forward

$61.00

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Union Butterfield - 3/16" Head Diam, 1/8" Shank Diam, Counterbore Pilot - A1 Tooling

Union Butterfield - 3/16" Head Diam, 1/8" Shank Diam, Counterbore Pilot


Item #: 65707143
Brand: Union Butterfield
Model #: 3210255

Product Specifications
Head Diameter (Inch) 3/16
Shank Diameter (Inch) 1/8
Finish/Coating Bright
Aircraft-Style No
Pilot Material High Speed Steel

$36.05

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Alvord Polk - 4-40 Fillister Head Screw Compatible, High Speed Steel, Solid Pilot Counterbore - A1 Tooling

Alvord Polk - 4-40 Fillister Head Screw Compatible, High Speed Steel, Solid Pilot Counterbore


Item #: 43983535
Brand: Alvord Polk
Model #: 03001

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic.
Product Specifications
Fastener Type Compatibility Fillister-Head Screw
Counterbore Diameter (Decimal Inch) 0.2020
Fastener Size Compatibility (Inch) 4-40
Counterbore Material High Speed Steel
Finish/Coating Bright
Standard or Oversize Pilot Oversize
Shank Diameter (Decimal Inch) 0.1562
Aircraft-Style No
Pilot Diameter (Decimal Inch) 0.1270
Shank Type Straight
Overall Length (Inch) 3-7/8
Overall Length (Decimal Inch) 3.88
Cutting Direction Forward

$31.68

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Made in USA - #10 Wire Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore - A1 Tooling

Made in USA - #10 Wire Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore


Item #: 08272775
Brand: Made in USA
Model #:

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic.
Product Specifications
Fastener Type Compatibility Socket-Head Cap Screw
Counterbore Diameter (Decimal Inch) 0.3300
Fastener Size Compatibility (Wire) #10
Counterbore Material High Speed Steel
Finish/Coating Bright
Standard or Oversize Pilot Oversize
Shank Diameter (Inch) 9/32
Number of Flutes 4
Aircraft-Style No
Pilot Diameter (Decimal Inch) 0.2050
Shank Type Straight
Overall Length (Inch) 5-1/4
Cutting Direction Forward

$44.81

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Union Butterfield - 1" Head Diam, 5/16" Shank Diam, Counterbore Pilot - A1 Tooling

Union Butterfield - 1" Head Diam, 5/16" Shank Diam, Counterbore Pilot


Item #: 65707168
Brand: Union Butterfield
Model #: 3210152

Product Specifications
Head Diameter (Inch) 1
Shank Diameter (Inch) 5/16
Finish/Coating Bright
Aircraft-Style No
Pilot Material High Speed Steel

$127.04

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Value Collection - 1" Head Diam, 7/16" Shank Diam, Counterbore Pilot - A1 Tooling

Value Collection - 1" Head Diam, 7/16" Shank Diam, Counterbore Pilot


Item #: 08908642
Brand: Value Collection
Model #:

Product Specifications
Head Diameter (Inch) 1
Shank Diameter (Inch) 7/16
Pilot Material Carbon Steel

$25.44

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Value Collection - 1-3/8" Head Diam, 3/8" Shank Diam, Counterbore Pilot - A1 Tooling

Value Collection - 1-3/8" Head Diam, 3/8" Shank Diam, Counterbore Pilot


Item #: 08907784
Brand: Value Collection
Model #:

Product Specifications
Head Diameter (Inch) 1-3/8
Shank Diameter (Inch) 3/8
Pilot Material Carbon Steel

$43.66

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Union Butterfield - 11/16" Head Diam, 1/4" Shank Diam, Counterbore Pilot - A1 Tooling

Union Butterfield - 11/16" Head Diam, 1/4" Shank Diam, Counterbore Pilot


Item #: 65707358
Brand: Union Butterfield
Model #: 3210138

Product Specifications
Head Diameter (Inch) 11/16
Shank Diameter (Inch) 1/4
Finish/Coating Bright
Aircraft-Style No
Pilot Material High Speed Steel

$81.76

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Union Butterfield - 15/16" Head Diam, 7/16" Shank Diam, Counterbore Pilot - A1 Tooling

Union Butterfield - 15/16" Head Diam, 7/16" Shank Diam, Counterbore Pilot


Item #: 65707226
Brand: Union Butterfield
Model #: 3210179

Product Specifications
Head Diameter (Inch) 15/16
Shank Diameter (Inch) 7/16
Finish/Coating Bright
Aircraft-Style No
Pilot Material High Speed Steel

$121.14

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Alvord Polk - 14mm Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore - A1 Tooling

Alvord Polk - 14mm Socket Head Cap Screw Compatible, High Speed Steel, Solid Pilot Counterbore


Item #: 43981430
Brand: Alvord Polk
Model #: 03087

Features and Benefits

High speed steel (HSS) provides good wear resistance and can be used in general purpose applications on both ferrous and nonferrous materials.
Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic.
Product Specifications
Fastener Type Compatibility Socket-Head Cap Screw
Counterbore Diameter (Decimal Inch) 0.8465
Fastener Size Compatibility (mm) 14.00
Fastener Size Compatibility (Decimal Inch) 0.5512
Counterbore Material High Speed Steel
Finish/Coating Bright
Standard or Oversize Pilot Standard
Shank Diameter (Decimal Inch) 0.6250
Aircraft-Style No
Pilot Diameter (Decimal Inch) 0.5709
Shank Type Straight
Overall Length (Inch) 7-1/2
Overall Length (Decimal Inch) 7.50
Cutting Direction Forward

$118.93

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Keo - 5/8" Socket Head Cap Screw Compatible, Cobalt, Solid Pilot Counterbore - A1 Tooling

Keo - 5/8" Socket Head Cap Screw Compatible, Cobalt, Solid Pilot Counterbore


Item #: 02828689
Brand: Keo
Model #: 55231

Features and Benefits

Cobalt is harder than high speed steel and provides better wear resistance. It is commonly used on high tensile alloys.
Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic.
Product Specifications
Fastener Type Compatibility Socket-Head Cap Screw
Counterbore Diameter (Decimal Inch) 0.9610
Fastener Size Compatibility (Inch) 5/8
Counterbore Material Cobalt
Finish/Coating Bright
Standard or Oversize Pilot Oversize
Shank Diameter (Inch) 5/8
Number of Flutes 3
Aircraft-Style No
Pilot Diameter (Decimal Inch) 0.6410
Shank Type Straight
Overall Length (Inch) 6
Cutting Direction Forward

$141.64

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It

Value Collection - 7/32" Head Diam, 3/32" Shank Diam, Counterbore Pilot - A1 Tooling

Value Collection - 7/32" Head Diam, 3/32" Shank Diam, Counterbore Pilot


Item #: 08901142
Brand: Value Collection
Model #:

Product Specifications
Head Diameter (Inch) 7/32
Shank Diameter (Inch) 3/32
Pilot Material Carbon Steel

$9.90

2% Off All Online Orders
Use Code: 2%OFF

Best Price Guarantee - Email Us A Better Published Price and We'll Beat It