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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 use with a 3/8" screw. It features a 1/32" oversized design with a 39/64 in bore diameter and a 0.406 in pilot diameter, identified by…

SKU 3G-OTH-184278

Also listed as: 902000310 · 902 000 310

Brand
KEO
Item
Oversized Built-in-Pilot Counterbore
Part Number
902-000-310
Category
Oversized Built-in-Pilot Counterbores
Available to Order
Also known as:902-000-310KEO
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Local office
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Phone
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Technical Specifications

KEO
Manufacturer Part Number
902-000-310
Bore Dia
39/64 in
Pilot Dia
0.406 in

Technical Documents

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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 use with a 3/8" screw. It features a 1/32" oversized design with a 39/64 in bore diameter and a 0.406 in pilot diameter, identified by manufacturer part number 902-000-310.

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 in metalworking applications. Its 1/32" oversized design provides clearance for screw heads that are slightly larger than standard, ensuring proper seating in precision machining and tooling operations.

What are the specifications of the KEO counterbore 902-000-310?

The KEO counterbore 902-000-310 has a 39/64 in bore diameter and a 0.406 in pilot diameter. It is an oversized built-in-pilot type designed for a 3/8" screw with a 1/32" oversize. The brand is KEO, and it is used for creating recesses in metal parts.

Where to buy KEO counterbore 902-000-310 worldwide?

You can source the KEO counterbore 902-000-310 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide locations. Contact us for availability and lead time on this KEO tool.

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 body size and the bore diameter to the screw head. For a 3/8" screw, the KEO 902-000-310 uses a 0.406 in pilot and 39/64 in bore with a 1/32" oversize for clearance. 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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