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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 902-000-219) is a standard built-in-pilot counterbore designed for M4 screws, featuring an 8 mm bore diameter and a 4.3 mm pilot diameter. This tool is constructed from TiN coated cobalt…

SKU 3G-OTH-202269

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
902-000-219
Type
TiN Coated Cobalt
Bore Dia
8 mm
Pilot Dia
4.3 mm
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KEO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The KEO Counterbore (MPN 902-000-219) is a standard built-in-pilot counterbore designed for M4 screws, featuring an 8 mm bore diameter and a 4.3 mm pilot diameter. This tool is constructed from TiN coated cobalt, offering durability for industrial applications.

Frequently Asked Questions

What is the KEO Counterbore 902-000-219 used for?

The KEO Counterbore 902-000-219 is used to create a flat-bottomed recess for M4 screw heads in metal or plastic workpieces. It is commonly applied in machining, toolmaking, and assembly operations where a flush screw fit is required. The TiN coated cobalt construction provides wear resistance for industrial use.

What are the specifications of the KEO Counterbore 902-000-219?

The KEO Counterbore 902-000-219 is a standard built-in-pilot counterbore for M4 screws. It has an 8 mm bore diameter and a 4.3 mm pilot diameter. The tool is made from TiN coated cobalt for durability. The manufacturer part number is 902-000-219, and it is produced by KEO.

Where to buy the KEO Counterbore 902-000-219 worldwide?

You can source the KEO Counterbore 902-000-219 worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We supply this KEO tool to customers across multiple industries.

How to select the correct KEO counterbore for M4 screws?

To select the correct KEO counterbore for M4 screws, match the pilot diameter to the screw's clearance hole (4.3 mm for M4) and the bore diameter to the screw head size (8 mm). Ensure the tool is TiN coated cobalt for extended life. Verify the manufacturer part number 902-000-219 for standard built-in-pilot design.

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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