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KEO Counterbore: For 1/2" Screw, 1/64" Oversized, 49/64 in Bore Dia - Oversized Built-in-Pilot Counterbores
KEOOversized Built-in-Pilot Counterbores

KEO Counterbore: For 1/2" Screw, 1/64" Oversized, 49/64 in Bore Dia

The KEO Counterbore is an oversized built-in-pilot counterbore designed for 1/2" screws. It features a 1/64" oversized bore with a 49/64 in bore diameter and a 0.515 in pilot diameter, identified by manufacturer part…

SKU 3G-OTH-184322

Brand
KEO
Item
Counterbore: For 1/2" Screw, 1/64" Oversized, 49/64 in Bore Dia
Category
Oversized Built-in-Pilot Counterbores
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Technical Specifications

KEO
Manufacturer Part Number
902-000-305
Bore Dia
49/64 in
Oversized
1/64"
Pilot Dia
0.515 in
Counterbore Type
Oversized
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KEO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The KEO Counterbore is an oversized built-in-pilot counterbore designed for 1/2" screws. It features a 1/64" oversized bore with a 49/64 in bore diameter and a 0.515 in pilot diameter, identified by manufacturer part number 902-000-305.

Frequently Asked Questions

What is a KEO oversized counterbore used for?

A KEO oversized counterbore creates a flat-bottomed recess for a 1/2" screw head, allowing it to sit flush or below the workpiece surface. The 1/64" oversized bore provides clearance for fasteners with slight dimensional variation, common in metalworking and machining applications.

What are the specifications of the KEO counterbore 902-000-305?

The KEO counterbore 902-000-305 is an oversized built-in-pilot type for 1/2" screws. It has a 49/64 in bore diameter, a 0.515 in pilot diameter, and is 1/64" oversized. The manufacturer part number is 902-000-305, and it is designed for precision counterboring in industrial machining.

Where to buy KEO counterbores worldwide?

3G Electric supplies KEO counterbores worldwide, handling full logistics and customs clearance for global delivery. As a sourcing partner across 14 industrial departments, we provide genuine KEO cutting tools like the 902-000-305 oversized counterbore. Contact us for availability and lead time to your location.

How to select the correct KEO counterbore for a 1/2" screw?

Select a KEO counterbore with a pilot diameter matching your existing hole (0.515 in for this model) and a bore diameter (49/64 in) that accommodates the screw head plus any required clearance. The 1/64" oversized option allows for slight fastener tolerance. Always verify the screw size and material before ordering.

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 oversized 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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