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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 (MPN 902-000-051) is a standard built-in-pilot counterbore designed for M4 screws, featuring an 8 mm bore diameter and a 4.5 mm pilot diameter. It is constructed from cobalt and manufactured by KEO.

SKU 3G-OTH-202270

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
902-000-051
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KEO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The KEO Counterbore (MPN 902-000-051) is a standard built-in-pilot counterbore designed for M4 screws, featuring an 8 mm bore diameter and a 4.5 mm pilot diameter. It is constructed from cobalt and manufactured by KEO.

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 902-000-051 used for?

The KEO Counterbore 902-000-051 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 or countersunk screw fit is required, ensuring proper seating and load distribution.

What are the specifications of the KEO Counterbore 902-000-051?

The KEO Counterbore 902-000-051 is a standard built-in-pilot counterbore for M4 screws. It has an 8 mm bore diameter and a 4.5 mm pilot diameter. The tool is made from cobalt for durability and is manufactured by KEO under MPN 902-000-051.

Where to buy the KEO Counterbore 902-000-051 worldwide?

You can source the KEO Counterbore 902-000-051 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring the tool reaches your facility reliably.

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 size (4.5 mm for M4) and the bore diameter to the screw head size (8 mm). Ensure the tool is cobalt for heat resistance. KEO offers standard built-in-pilot designs for precise alignment.

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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