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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 (MPN 902-000-156). This tool is…

SKU 3G-OTH-184288

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
902-000-156
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 (MPN 902-000-156). This tool is manufactured by KEO.

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, with a 1/64" oversized bore to provide clearance. It is used in machining and metalworking to ensure screw heads sit flush or below the workpiece surface.

What are the specifications of the KEO counterbore 902-000-156?

The KEO counterbore (MPN 902-000-156) has a 49/64 in bore diameter, a 0.515 in pilot diameter, and is 1/64" oversized for 1/2" screws. It is an oversized built-in-pilot counterbore manufactured by KEO.

Where to buy KEO counterbore 902-000-156 worldwide?

3G Electric supplies the KEO counterbore 902-000-156 worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on this KEO tool.

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

Select a KEO counterbore with a pilot diameter matching the screw's clearance hole (0.515 in for 1/2" screws) and a bore diameter (49/64 in) that accommodates the screw head. The 1/64" oversized version provides extra clearance for assembly.

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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