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KEO Built-in-Pilot Counterbore, 8 mm Bore, 3.3 mm Pilot, Cobalt, for M4 Screws - Built-in-Pilot Counterbores
KEOBuilt-in-Pilot Counterbores

KEO Built-in-Pilot Counterbore, 8 mm Bore, 3.3 mm Pilot, Cobalt, for M4 Screws

The KEO Counterbore (MPN 902-000-049) is a standard built-in-pilot counterbore designed for M4 screws, featuring an 8 mm bore diameter and a 3.3 mm pilot diameter, constructed from cobalt. This tool is manufactured…

SKU 3G-OTH-202267

Also listed as: 902000049 · 902 000 049

Brand
KEO
Item
Built-in-Pilot Counterbore, 8 mm Bore, 3.3 mm Pilot, Cobalt, for M4 Screws
Category
Built-in-Pilot Counterbores
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

KEO
Manufacturer Part Number
902-000-049

Technical Documents

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KEO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The KEO Counterbore (MPN 902-000-049) is a standard built-in-pilot counterbore designed for M4 screws, featuring an 8 mm bore diameter and a 3.3 mm pilot diameter, constructed from cobalt. This tool is manufactured by KEO.

Frequently Asked Questions

What is the KEO Counterbore 902-000-049 used for?

The KEO Counterbore 902-000-049 is used to create a flat-bottomed recess for M4 screw heads in metal or plastic parts. Its built-in pilot aligns with a pre-drilled hole, ensuring concentric counterboring. This cobalt tool is common in machining, tool-and-die, and general industrial fabrication.

What are the specifications of the KEO Counterbore 902-000-049?

This KEO counterbore has an 8 mm bore diameter and a 3.3 mm pilot diameter, designed for M4 screws. It is a standard built-in-pilot type made from cobalt. The manufacturer part number is 902-000-049. These specs ensure precise counterboring for M4 fasteners in industrial applications.

Where to buy the KEO Counterbore 902-000-049 worldwide?

3G Electric supplies the KEO Counterbore 902-000-049 to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial solutions provider, we source genuine KEO cutting tools and support procurement across 14 industrial departments.

How to select the correct KEO counterbore for M4 screws?

Select a KEO counterbore with a bore diameter matching the screw head size (8 mm for M4) and a pilot diameter equal to the screw's body diameter (3.3 mm for M4). Ensure the tool is cobalt for heat resistance. Always verify the pilot fits snugly in the pre-drilled hole to avoid chatter.

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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Cross-referenced by specification & description
This built-in-pilot counterbore is designed for M4 screws, with an 8 mm bore diameter and a 4.3 mm pilot diameter. Constructed from cobalt, it creates flat-bottomed recesses for screw heads in metal or plastic parts. The integral pilot ensures accurate alignment during counterboring operations in machining and assembly applications
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This built-in-pilot counterbore is designed for M4 screws, with an 8 mm bore diameter and a 4.3 mm pilot diameter. Constructed from cobalt, it creates flat-bottomed recesses for screw heads in metal or plastic parts. The integral pilot ensures accurate alignment during counterboring operations in machining and assembly applications
This built-in-pilot counterbore is designed for M4 screws, with an 8 mm bore diameter and a 4.5 mm pilot diameter. Constructed from cobalt, it creates flat-bottomed recesses for screw heads in metal or plastic workpieces. Commonly used in machining and assembly operations to ensure flush screw fit and proper load distribution
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This built-in-pilot counterbore is designed for M4 screws, with an 8 mm bore diameter and a 4.5 mm pilot diameter. Constructed from cobalt, it creates flat-bottomed recesses for screw heads in metal or plastic workpieces. Commonly used in machining and assembly operations to ensure flush screw fit and proper load distribution
Built-in-pilot counterbore for creating flat-bottomed recesses for M4 screw heads. Features a 3.3 mm pilot diameter and 8 mm bore diameter. Constructed from TiN coated cobalt for wear resistance. Used in metalworking and machining applications requiring precise fastener seating
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Built-in-pilot counterbore for creating flat-bottomed recesses for M4 screw heads. Features a 3.3 mm pilot diameter and 8 mm bore diameter. Constructed from TiN coated cobalt for wear resistance. Used in metalworking and machining applications requiring precise fastener seating
This built-in-pilot counterbore is designed for M3.5 screws, with a 6.5 mm bore diameter and a 3.9 mm pilot diameter. Constructed from cobalt, it creates a flat-bottomed recess for screw heads, allowing them to sit flush with or below the workpiece surface. Used in machining and assembly applications for metal and other materials
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This built-in-pilot counterbore is designed for M3.5 screws, with a 6.5 mm bore diameter and a 3.9 mm pilot diameter. Constructed from cobalt, it creates a flat-bottomed recess for screw heads, allowing them to sit flush with or below the workpiece surface. Used in machining and assembly applications for metal and other materials
Standard built-in-pilot counterbore for M3 screws. Features a 6 mm bore diameter and 3.4 mm pilot diameter. Constructed from cobalt. Used to create flat-bottomed recesses for screw heads in metal or plastic workpieces during machining and assembly operations
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Standard built-in-pilot counterbore for M3 screws. Features a 6 mm bore diameter and 3.4 mm pilot diameter. Constructed from cobalt. Used to create flat-bottomed recesses for screw heads in metal or plastic workpieces during machining and assembly operations
This built-in-pilot counterbore is designed for M3 screws, with a 6 mm bore diameter and a 3.2 mm pilot diameter. Constructed from cobalt, it creates flat-bottomed recesses for screw heads in metal or plastic workpieces. The integral pilot aligns with existing holes for accurate counterboring in general machining and maintenance tasks
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This built-in-pilot counterbore is designed for M3 screws, with a 6 mm bore diameter and a 3.2 mm pilot diameter. Constructed from cobalt, it creates flat-bottomed recesses for screw heads in metal or plastic workpieces. The integral pilot aligns with existing holes for accurate counterboring in general machining and maintenance tasks

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This KEO built-in-pilot counterbore is designed for use with 1/4 in screws, featuring a 3/8 in bore diameter and a 0.25 in pilot diameter. Constructed from cobalt, it creates a flat-bottomed recess for bolt heads or screws to sit flush with or below the workpiece surface. Suitable for general machining and metalworking applications requiring precise counterboring operations
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This KEO built-in-pilot counterbore is designed for use with 1/4 in screws, featuring a 3/8 in bore diameter and a 0.25 in pilot diameter. Constructed from cobalt, it creates a flat-bottomed recess for bolt heads or screws to sit flush with or below the workpiece surface. Suitable for general machining and metalworking applications requiring precise counterboring operations
Built-in-pilot counterbore for creating flat-bottomed recesses for socket-head cap screws. Features a 20 mm bore diameter and 14 mm pilot diameter. Constructed from TiN coated cobalt for wear resistance. Commonly used in machining, fixture building, and industrial assembly
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Built-in-pilot counterbore for creating flat-bottomed recesses for socket-head cap screws. Features a 20 mm bore diameter and 14 mm pilot diameter. Constructed from TiN coated cobalt for wear resistance. Commonly used in machining, fixture building, and industrial assembly
This built-in-pilot counterbore is designed for M3.5 screws, with a 6.5 mm bore diameter and a 3.7 mm pilot diameter. Made from cobalt, it creates recessed cylindrical holes for screw heads in machining and metalworking applications
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This built-in-pilot counterbore is designed for M3.5 screws, with a 6.5 mm bore diameter and a 3.7 mm pilot diameter. Made from cobalt, it creates recessed cylindrical holes for screw heads in machining and metalworking applications
This KEO counterbore is a standard-type cutting tool designed for 5/8" screws. It features a 15/16 in bore diameter and a 0.625 in pilot diameter, constructed from cobalt material. Used in metalworking and machining to create flat-bottomed recesses for bolt heads or nuts, allowing them to sit flush with or below the workpiece surface
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This KEO counterbore is a standard-type cutting tool designed for 5/8" screws. It features a 15/16 in bore diameter and a 0.625 in pilot diameter, constructed from cobalt material. Used in metalworking and machining to create flat-bottomed recesses for bolt heads or nuts, allowing them to sit flush with or below the workpiece surface
This built-in-pilot counterbore is designed for #10 screws, with a 5/16 in bore diameter and a 0.19 in pilot diameter. Made from cobalt, it is used in machining operations to create recessed holes for screw heads, with the built-in pilot ensuring alignment. Typical applications include industrial machining of steel and cast iron
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This built-in-pilot counterbore is designed for #10 screws, with a 5/16 in bore diameter and a 0.19 in pilot diameter. Made from cobalt, it is used in machining operations to create recessed holes for screw heads, with the built-in pilot ensuring alignment. Typical applications include industrial machining of steel and cast iron
This standard-type counterbore creates a flat-bottomed recess for 3/8" screw heads, allowing them to sit flush with or below the workpiece surface. It features a 37/64 in bore diameter and a 0.375 in pilot diameter, constructed from cobalt material. Suitable for general metalworking and machining applications requiring precision countersinking
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This standard-type counterbore creates a flat-bottomed recess for 3/8" screw heads, allowing them to sit flush with or below the workpiece surface. It features a 37/64 in bore diameter and a 0.375 in pilot diameter, constructed from cobalt material. Suitable for general metalworking and machining applications requiring precision countersinking
This counterbore features a built-in pilot for alignment and is made from TiN coated cobalt for wear resistance. It has a 15/32 in bore diameter and a 0.312 in pilot diameter. Used in machining to create recessed flat-bottom holes for screw heads to sit flush with the workpiece surface
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This counterbore features a built-in pilot for alignment and is made from TiN coated cobalt for wear resistance. It has a 15/32 in bore diameter and a 0.312 in pilot diameter. Used in machining to create recessed flat-bottom holes for screw heads to sit flush with the workpiece surface
Built-in-pilot counterbore with AlTiN coated cobalt construction. Features a 5/16 in bore diameter and 0.19 in pilot diameter. Used to create flat-bottomed recesses for screw heads in precision machining and metalworking applications
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Built-in-pilot counterbore with AlTiN coated cobalt construction. Features a 5/16 in bore diameter and 0.19 in pilot diameter. Used to create flat-bottomed recesses for screw heads in precision machining and metalworking applications