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KEO Oversized Built-in-Pilot Counterbore - Oversized Built-in-Pilot Counterbores
KEOOversized Built-in-Pilot Counterbores

KEO Oversized Built-in-Pilot Counterbore

The KEO Counterbore is an oversized built-in-pilot counterbore designed for 3/8" screws. It features a 1/64" oversized bore with a 19/32 in bore diameter and a 0.39 in pilot diameter (MPN 902-000-138). This tool is…

SKU 3G-OTH-184275

Also listed as: 902000138 · 902 000 138

Brand
KEO
Item
Oversized Built-in-Pilot Counterbore
Part Number
902-000-138
Category
Oversized Built-in-Pilot Counterbores
Available to Order
Also known as:902-000-138KEO
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Technical Specifications

KEO
Manufacturer Part Number
902-000-138
Bore Dia
19/32 in
Pilot Dia
0.39 in

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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 3/8" screws. It features a 1/64" oversized bore with a 19/32 in bore diameter and a 0.39 in pilot diameter (MPN 902-000-138). This tool is manufactured by KEO.

Frequently Asked Questions

What is the KEO oversized counterbore used for?

The KEO oversized counterbore is used to create a flat-bottomed recess for a 3/8" screw head, allowing the fastener to sit flush with or below the workpiece surface. It is commonly applied in metalworking and machining operations where precise screw seating is required.

What are the specifications of the KEO counterbore 902-000-138?

The KEO counterbore MPN 902-000-138 is an oversized built-in-pilot type for 3/8" screws. It has a 1/64" oversized bore, a 19/32 in bore diameter, and a 0.39 in pilot diameter. The tool is manufactured by KEO and is designed for industrial machining applications.

Where to buy the KEO counterbore 902-000-138 worldwide?

3G Electric supplies the KEO counterbore 902-000-138 worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this tool for your machining needs.

How to select the correct KEO counterbore for a 3/8" screw?

To select the correct KEO counterbore, match the pilot diameter to the screw's clearance hole and the bore diameter to the screw head size. For a 3/8" screw, the KEO oversized counterbore with a 19/32 in bore and 0.39 in pilot is suitable. Always verify the screw head dimensions before ordering.

Used in

Common applications for KEO
General machining — KEO single-flute countersinks for deburring and chamfering holes in steel and aluminum.
Automotive repair — KEO 82° countersinks for creating seats for flathead screws in engine and chassis components.
Aerospace manufacturing — KEO TiAlN-coated carbide countersinks for precision chamfering of fastener holes in hard alloys.
MRO operations — KEO left-hand keyseat cutters for milling keyways in shafts during equipment repair.
Metal fabrication — KEO 90° countersinks for chamfering plate and structural steel before welding.
Machine shop — KEO 100° countersinks for deburring cross-drilled holes in hydraulic manifolds.
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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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This oversized built-in-pilot counterbore is made from cobalt and features a 1 13/64 in bore diameter with a 0.781 in pilot diameter. The 1/32" oversized design provides clearance for fasteners in metalworking applications, creating a flat-bottomed recess for screw heads to ensure proper seating and flush assembly
KEO
This oversized built-in-pilot counterbore is made from cobalt and features a 1 13/64 in bore diameter with a 0.781 in pilot diameter. The 1/32" oversized design provides clearance for fasteners in metalworking applications, creating a flat-bottomed recess for screw heads to ensure proper seating and flush assembly

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