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KEO Counterbore: For 7/16" Screw, 21/32 in Bore Dia, 0.437 in Pilot Dia - Built-in-Pilot Counterbores
KEOBuilt-in-Pilot Counterbores

KEO Counterbore: For 7/16" Screw, 21/32 in Bore Dia, 0.437 in Pilot Dia

The KEO Built-in-Pilot Counterbore is a standard tool designed for 7/16" screws, featuring a 21/32 in bore diameter and a 0.437 in pilot diameter. It is constructed with AlTiN coated cobalt, as specified by…

SKU 3G-OTH-202242

Brand
KEO
Item
Counterbore: For 7/16" Screw, 21/32 in Bore Dia, 0.437 in Pilot Dia
Category
Built-in-Pilot Counterbores
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Technical Specifications

KEO
Manufacturer Part Number
902-000-309
Type
AlTiN Coated Cobalt
Bore Dia
21/32 in
Pilot Dia
0.437 in
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KEO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The KEO Built-in-Pilot Counterbore is a standard tool designed for 7/16" screws, featuring a 21/32 in bore diameter and a 0.437 in pilot diameter. It is constructed with AlTiN coated cobalt, as specified by manufacturer part number 902-000-309.

Frequently Asked Questions

What is the KEO Counterbore 902-000-309 used for?

The KEO Counterbore 902-000-309 is a built-in-pilot counterbore used to create a flat-bottomed recess for 7/16" screw heads in metalworking. It is commonly applied in machining operations where a precise, countersunk fit is required for assembly, such as in automotive or industrial equipment manufacturing.

What are the specifications of the KEO Counterbore 902-000-309?

The KEO Counterbore 902-000-309 is a standard tool for 7/16" screws, with a 21/32 in bore diameter and a 0.437 in pilot diameter. It features AlTiN coated cobalt construction for wear resistance. The manufacturer part number is 902-000-309, and it is produced by KEO.

Where to buy the KEO Counterbore 902-000-309 worldwide?

You can source the KEO Counterbore 902-000-309 worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we supply this KEO tool to customers internationally.

How to select the correct KEO counterbore for a 7/16" screw?

To select the correct KEO counterbore for a 7/16" screw, match the pilot diameter to the screw's clearance hole and the bore diameter to the screw head size. For the 902-000-309, the pilot is 0.437 in and bore is 21/32 in. Always verify the tool's coating and material—AlTiN coated cobalt offers heat resistance for extended tool life.

Used in

Common applications for KEO
Metalworking — KEO plain-tip center drills for creating accurate starting points in lathe operations
Automotive manufacturing — KEO bell-tip center drills for countersinking holes in engine components
Aerospace machining — KEO radius-tip center drills for reducing stress risers in critical parts
General machining — KEO keyseat cutters for milling keyways in shafts and gears
Tool and die making — KEO TiN-coated center drills for extended tool life in hardened steels
Precision engineering — KEO cobalt center drills for high-temperature alloy applications

KEO Products

3G Electric supplies KEO built-in-pilot counterbores. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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