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)

Union Butterfield - 25/32" Diam, 5/8" Shank, Diam, 3 Flutes, Straight Shank, Interchangeable Pilot Counterbore - 5-3/8" OAL, 1-1/2" Flute Length, Bright Finish, High Speed Steel - A1 Tooling

Union Butterfield - 25/32" Diam, 5/8" Shank, Diam, 3 Flutes, Straight Shank, Interchangeable Pilot Counterbore - 5-3/8" OAL, 1-1/2" Flute Length, Bright Finish, High Speed Steel


Item #: 65707895
Brand: Union Butterfield
Model #: 6210048
Exact Tooling IR#: 04

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.
Product Specifications
Counterbore Diameter (Inch) 25/32
Counterbore Diameter (Decimal Inch) 0.7813
Pilot Shank Diameter Compatibility (Inch) 1/4
Pilot Shank Diameter Compatibility (Decimal Inch) 0.2500
Finish/Coating Bright
Counterbore Material High Speed Steel
Number of Flutes 3
Shank Type Straight
Shank Diameter (Inch) 5/8
Shank Diameter (Decimal Inch) 0.6250
Aircraft-Style No
Overall Length (Decimal Inch) 5.3750
Overall Length (Inch) 5-3/8
Flute Length (Decimal Inch) 1.50
Flute Length (Inch) 1-1/2
Cutting Direction Forward
Material Application Alloy Steel; Brass; Bronze; Carbon Steel; Cast Iron; Copper; Copper Alloys; Free Machining Stainless Steel; Hardened Steel; Nickel; Nickel Alloys; Stainless Steel; Steel; Structural Steel; Titanium; Titanium Alloys

$230.22

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 - 25/32" Diam, 5/8" Shank, Diam, 3 Flutes, Straight Shank, Interchangeable Pilot Counterbore - 5-3/8" OAL, 3-7/8" OAL Shank, Bright Finish, High Speed Steel - A1 Tooling

Value Collection - 25/32" Diam, 5/8" Shank, Diam, 3 Flutes, Straight Shank, Interchangeable Pilot Counterbore - 5-3/8" OAL, 3-7/8" OAL Shank, Bright Finish, High Speed Steel


Item #: 08790503
Brand: Value Collection
Exact Tooling IR#: 04

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.
Product Specifications
Counterbore Diameter (Inch) 25/32
Pilot Shank Diameter Compatibility (Inch) 1/4
Finish/Coating Bright
Counterbore Material High Speed Steel
Number of Flutes 3
Shank Type Straight
Shank Diameter (Inch) 5/8
Aircraft-Style No
Shank Length (Inch) 3-7/8
Overall Length (Inch) 5-3/8
Cutting Direction Forward

$83.85

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 - 1/4" Diam, 1/4" Shank, Diam, 4 Flutes, Straight Shank, Interchangeable Pilot Counterbore - 2-3/8" OAL, 1/2" Flute Length, Bright Finish, High Speed Steel, Aircraft Style - A1 Tooling

Union Butterfield - 1/4" Diam, 1/4" Shank, Diam, 4 Flutes, Straight Shank, Interchangeable Pilot Counterbore - 2-3/8" OAL, 1/2" Flute Length, Bright Finish, High Speed Steel, Aircraft Style


Item #: 87827994
Brand: Union Butterfield
Model #: 6210137
Exact Tooling IR#: 04

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.
Product Specifications
Counterbore Diameter (Inch) 1/4
Counterbore Diameter (Decimal Inch) 0.2500
Pilot Shank Diameter Compatibility (Inch) 3/32
Pilot Shank Diameter Compatibility (Decimal Inch) 0.0938
Finish/Coating Bright
Counterbore Material High Speed Steel
Number of Flutes 4
Shank Type Straight
Shank Diameter (Inch) 1/4
Shank Diameter (Decimal Inch) 0.2500
Aircraft-Style Yes
Overall Length (Decimal Inch) 2.3750
Overall Length (Inch) 2-3/8
Flute Length (Decimal Inch) 0.50
Flute Length (Inch) 1/2
Cutting Direction Forward
Material Application Alloy Steel; Brass; Bronze; Carbon Steel; Cast Iron; Copper; Copper Alloys; Free Machining Stainless Steel; Hardened Steel; Nickel; Nickel Alloys; Stainless Steel; Steel; Structural Steel; Titanium; Titanium Alloys

$102.99

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 - 9/16" Diam, 1/2" Shank, Diam, 3 Flutes, Straight Shank, Interchangeable Pilot Counterbore - 4-5/16" OAL, Bright Finish, Carbide-Tipped - A1 Tooling

Made in USA - 9/16" Diam, 1/2" Shank, Diam, 3 Flutes, Straight Shank, Interchangeable Pilot Counterbore - 4-5/16" OAL, Bright Finish, Carbide-Tipped


Item #: 78803368
Brand: Made in USA
Exact Tooling IR#: 04

Features and Benefits

Carbide tips cuts faster than high speed steel. It is commonly used on ferrous and nonferrous materials including cast iron, steel and steel alloys.
Product Specifications
Counterbore Diameter (Inch) 9/16
Pilot Shank Diameter Compatibility (Inch) 3/16
Pilot Shank Diameter Compatibility (Decimal Inch) 0.1875
Finish/Coating Bright
Counterbore Material Carbide-Tipped
Number of Flutes 3
Shank Type Straight
Shank Diameter (Inch) 1/2
Aircraft-Style No
Overall Length (Inch) 4-5/16
Cutting Direction Forward
Material Application Steel

$213.05

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 - 13/16" Head Diam, 1/2" Shank Diam, Counterbore Pilot - Carbon Steel - A1 Tooling

Value Collection - 13/16" Head Diam, 1/2" Shank Diam, Counterbore Pilot - Carbon Steel


Item #: 08909525
Brand: Value Collection
Exact Tooling IR#: 04

Product Specifications
Head Diameter (Inch) 13/16
Shank Diameter (Inch) 1/2
Pilot Material Carbon Steel

$21.26

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 - 7/8" Head Diam, 5/16" Shank Diam, Counterbore Pilot - Carbon Steel - A1 Tooling

Value Collection - 7/8" Head Diam, 5/16" Shank Diam, Counterbore Pilot - Carbon Steel


Item #: 08906562
Brand: Value Collection
Exact Tooling IR#: 04

Product Specifications
Head Diameter (Inch) 7/8
Shank Diameter (Inch) 5/16
Pilot Material Carbon Steel

$23.07

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

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

APT - Blade-Type Counterbore Set Screw - 7/8" Compatibility - A1 Tooling

APT - Blade-Type Counterbore Set Screw - 7/8" Compatibility


Item #: 04246963
Brand: APT
Model #: 05554050
Exact Tooling IR#: 04

Product Specifications
Product Type Set Screw
Fastener Size Compatibility (Inch) 7/8

$0.87

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" Fastener Compatible, 3/32" Blade Thickness Compatibility, 17/32" Pilot Hole Diam, 1/2" Shank Diam, Straight Shank, Blade Type Counterbore Holder - 5-3/4" Holder Length, Socket Head Cap Screw Compatible, High Speed Steel Holder - A1 Tooling

APT - 1/2" Fastener Compatible, 3/32" Blade Thickness Compatibility, 17/32" Pilot Hole Diam, 1/2" Shank Diam, Straight Shank, Blade Type Counterbore Holder - 5-3/4" Holder Length, Socket Head Cap Screw Compatible, High Speed Steel Holder


Item #: 08863326
Brand: APT
Model #: BH16
Exact Tooling IR#: 04

Features and Benefits

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
Fastener Size Compatibility (Inch) 1/2
Blade Thickness Compatibility (Inch) 3/32
Shank Type Straight
Pilot Hole Diameter (Inch) 17/32
Shank Diameter (Inch) 1/2
Holder Length (Inch) 5-3/4
Holder Material High Speed Steel

$72.34

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 - 1-1/8" Head Diam, 3/8" Shank Diam, Counterbore Pilot - Bright Finish, Carbon Steel - A1 Tooling

Made in USA - 1-1/8" Head Diam, 3/8" Shank Diam, Counterbore Pilot - Bright Finish, Carbon Steel


Item #: 78907706
Brand: Made in USA
Exact Tooling IR#: 04

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

$51.84

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 - 1/2" Head Diam, 7/16" Shank Diam, Counterbore Pilot - Carbon Steel - A1 Tooling

Made in USA - 1/2" Head Diam, 7/16" Shank Diam, Counterbore Pilot - Carbon Steel


Item #: 78908324
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Head Diameter (Inch) 1/2
Shank Diameter (Inch) 7/16
Pilot Material Carbon Steel

$18.21

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

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

APT - 13/32" Cutting Diam, 1/16" Thick Blade, 1/4" Fastener Compatibility, Backward Cutting, Blade Type Counterbore Blade - High Speed Steel, Socket Head Cap Screw Compatible - A1 Tooling

APT - 13/32" Cutting Diam, 1/16" Thick Blade, 1/4" Fastener Compatibility, Backward Cutting, Blade Type Counterbore Blade - High Speed Steel, Socket Head Cap Screw Compatible


Item #: 08864712
Brand: APT
Model #: ABZ13
Exact Tooling IR#: 04

Product Specifications
Fastener Type Compatibility Socket-Head Cap Screw
Fastener Size Compatibility (Inch) 1/4
Cutting Diameter (Inch) 13/32
Cutting Direction Backward
Blade Thickness (Inch) 1/16
Blade Material High Speed Steel

$33.70

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 - 1/4" Head Diam, 3/16" Shank Diam, Counterbore Pilot - Carbon Steel - A1 Tooling

Value Collection - 1/4" Head Diam, 3/16" Shank Diam, Counterbore Pilot - Carbon Steel


Item #: 08904161
Brand: Value Collection
Exact Tooling IR#: 04

Product Specifications
Head Diameter (Inch) 1/4
Shank Diameter (Inch) 3/16
Pilot Material Carbon Steel

$9.87

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

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

Cleveland - 25/32" Head Diam, 5/16" Shank Diam, Counterbore Pilot - Bright Finish, High Speed Steel - A1 Tooling

Cleveland - 25/32" Head Diam, 5/16" Shank Diam, Counterbore Pilot - Bright Finish, High Speed Steel


Item #: 63677769
Brand: Cleveland
Model #: C46673
Exact Tooling IR#: 04

Product Specifications
Head Diameter (Inch) 25/32
Shank Diameter (Inch) 5/16
Finish/Coating Bright
Aircraft-Style No
Pilot Material High Speed Steel
Material Application Alloy Tool Steel; Aluminum; Cast Iron; Low Carbon Steel; Medium Carbon Steel

$70.47

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 - 13/16" Head Diam, 7/16" Shank Diam, Counterbore Pilot - Carbon Steel - A1 Tooling

Value Collection - 13/16" Head Diam, 7/16" Shank Diam, Counterbore Pilot - Carbon Steel


Item #: 08908527
Brand: Value Collection
Exact Tooling IR#: 04

Product Specifications
Head Diameter (Inch) 13/16
Shank Diameter (Inch) 7/16
Pilot Material Carbon Steel

$18.71

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 - 5/8" Head Diam, 1/4" Shank Diam, Counterbore Pilot - Bright Finish, Carbon Steel - A1 Tooling

Made in USA - 5/8" Head Diam, 1/4" Shank Diam, Counterbore Pilot - Bright Finish, Carbon Steel


Item #: 78905403
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Head Diameter (Inch) 5/8
Shank Diameter (Inch) 1/4
Finish/Coating Bright
Aircraft-Style No
Pilot Material Carbon Steel

$24.95

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 - 3/4" Head Diam, 5/16" Shank Diam, Counterbore Pilot - Bright Finish, High Speed Steel - A1 Tooling

Union Butterfield - 3/4" Head Diam, 5/16" Shank Diam, Counterbore Pilot - Bright Finish, High Speed Steel


Item #: 66386806
Brand: Union Butterfield
Model #: 3210148
Exact Tooling IR#: 04

Product Specifications
Head Diameter (Inch) 3/4
Shank Diameter (Inch) 5/16
Finish/Coating Bright
Aircraft-Style No
Pilot Material High Speed Steel

$92.60

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 - 7/8" Head Diam, 5/16" Shank Diam, Counterbore Pilot - Bright Finish, Carbon Steel - A1 Tooling

Made in USA - 7/8" Head Diam, 5/16" Shank Diam, Counterbore Pilot - Bright Finish, Carbon Steel


Item #: 78906567
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Head Diameter (Inch) 7/8
Shank Diameter (Inch) 5/16
Finish/Coating Bright
Aircraft-Style No
Pilot Material Carbon Steel

$34.24

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 - 9/16" Head Diam, 5/16" Shank Diam, Counterbore Pilot - Bright Finish, Carbon Steel - A1 Tooling

Made in USA - 9/16" Head Diam, 5/16" Shank Diam, Counterbore Pilot - Bright Finish, Carbon Steel


Item #: 78906369
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Head Diameter (Inch) 9/16
Shank Diameter (Inch) 5/16
Finish/Coating Bright
Aircraft-Style No
Pilot Material Carbon Steel

$21.29

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 - 15/16" Head Diam, 7/16" Shank Diam, Counterbore Pilot - Carbon Steel - A1 Tooling

Made in USA - 15/16" Head Diam, 7/16" Shank Diam, Counterbore Pilot - Carbon Steel


Item #: 78908605
Brand: Made in USA
Exact Tooling IR#: 04

Product Specifications
Head Diameter (Inch) 15/16
Shank Diameter (Inch) 7/16
Pilot Material Carbon Steel

$34.82

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 - 3/16" Head Diam, 3/32" Shank Diam, Counterbore Pilot - Carbon Steel - A1 Tooling

Value Collection - 3/16" Head Diam, 3/32" Shank Diam, Counterbore Pilot - Carbon Steel


Item #: 08901126
Brand: Value Collection
Exact Tooling IR#: 04

Product Specifications
Head Diameter (Inch) 3/16
Shank Diameter (Inch) 3/32
Pilot Material Carbon Steel

$8.63

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

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