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KEO Counterbore: For M4 Screw, 8 mm Bore Dia, 4.3 mm Pilot Dia - Built-in-Pilot Counterbores
KEOBuilt-in-Pilot Counterbores

KEO Counterbore: For M4 Screw, 8 mm Bore Dia, 4.3 mm Pilot Dia

The KEO Counterbore (MPN 902-000-050) is a standard built-in-pilot counterbore designed for M4 screws, featuring an 8 mm bore diameter and a 4.3 mm pilot diameter, constructed from cobalt. This tool is manufactured…

SKU 3G-OTH-202268

Brand
KEO
Item
Counterbore: For M4 Screw, 8 mm Bore Dia, 4.3 mm Pilot Dia
Category
Built-in-Pilot Counterbores
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Technical Specifications

KEO
Manufacturer Part Number
902-000-050
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KEO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The KEO Counterbore (MPN 902-000-050) is a standard built-in-pilot counterbore designed for M4 screws, featuring an 8 mm bore diameter and a 4.3 mm pilot diameter, constructed from cobalt. This tool is manufactured by KEO and is intended for industrial counterboring applications.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the KEO Counterbore 902-000-050 used for?

The KEO Counterbore 902-000-050 is used to create a flat-bottomed recess for M4 screw heads in metal or plastic parts. Its built-in pilot aligns the tool for accurate counterboring, making it essential in machining, tooling, and assembly operations across industrial departments.

What are the specifications of the KEO Counterbore 902-000-050?

This KEO Counterbore has an 8 mm bore diameter and a 4.3 mm pilot diameter, designed for M4 screws. It is a standard built-in-pilot type made from cobalt, with manufacturer part number 902-000-050. KEO tools are known for durability in precision machining.

Where to buy the KEO Counterbore 902-000-050 worldwide?

3G Electric supplies the KEO Counterbore 902-000-050 to customers worldwide. We handle full logistics, customs clearance, and delivery, ensuring you receive the correct tool for your application. Contact us for availability and lead time on this cobalt counterbore.

How to select the correct KEO Counterbore for M4 screws?

To select the correct KEO Counterbore for M4 screws, match the bore diameter to the screw head size (8 mm) and the pilot diameter to the screw body (4.3 mm). Ensure the tool is cobalt for heat resistance. 3G Electric can help source the right KEO tool for your job.

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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