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KEO Counterbore: For M4 Screw, 8 mm Bore Dia, 4.5 mm Pilot Dia - Built-in-Pilot Counterbores
KEOBuilt-in-Pilot Counterbores

KEO Counterbore: For M4 Screw, 8 mm Bore Dia, 4.5 mm Pilot Dia

The KEO Counterbore is a built-in-pilot counterbore designed for M4 screws, featuring an 8 mm bore diameter and a 4.5 mm pilot diameter. This standard tool is constructed from TiN coated cobalt, as indicated by…

SKU 3G-OTH-202307

Brand
KEO
Item
Counterbore: For M4 Screw, 8 mm Bore Dia, 4.5 mm Pilot Dia
Category
Built-in-Pilot Counterbores
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Technical Specifications

KEO
Manufacturer Part Number
902-000-222
Type
TiN Coated Cobalt
Bore Dia
8 mm
Pilot Dia
4.5 mm
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KEO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The KEO Counterbore is a built-in-pilot counterbore designed for M4 screws, featuring an 8 mm bore diameter and a 4.5 mm pilot diameter. This standard tool is constructed from TiN coated cobalt, as indicated by manufacturer part number 902-000-222.

Frequently Asked Questions

What is the KEO Counterbore used for?

The KEO Counterbore is used to create a flat-bottomed recess for M4 screw heads in metal or plastic workpieces. It is commonly applied in machining and assembly operations where a flush screw fit is required, such as in jigs, fixtures, and precision equipment.

What are the specifications of the KEO Counterbore 902-000-222?

The KEO Counterbore 902-000-222 is a standard built-in-pilot tool for M4 screws. It has an 8 mm bore diameter and a 4.5 mm pilot diameter. The tool is made from TiN coated cobalt, providing wear resistance and extended tool life in industrial machining applications.

Where to buy the KEO Counterbore 902-000-222 worldwide?

You can source the KEO Counterbore 902-000-222 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this standard TiN coated cobalt counterbore.

How to select the correct KEO Counterbore for M4 screws?

To select the correct KEO Counterbore for M4 screws, ensure the bore diameter matches the screw head size (8 mm) and the pilot diameter fits the existing hole (4.5 mm). Verify the tool is TiN coated cobalt for durability. Always match the counterbore to the screw size and material being machined.

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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