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KEO 90° Four-Flute Machine Countersink, 1/2 in Body Dia, Cobalt Steel - Four-Flute Machine Countersinks
KEOFour-Flute Machine Countersinks

KEO 90° Four-Flute Machine Countersink, 1/2 in Body Dia, Cobalt Steel

KEO Four-Flute Machine Countersinks.

SKU 3G-OTH-185986

Also listed as: 919000539 · 919 000 539

Brand
KEO
Item
90° Four-Flute Machine Countersink, 1/2 in Body Dia, Cobalt Steel
Category
Four-Flute Machine Countersinks
Available to Order
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

KEO
Manufacturer Part Number
919-000-539

Technical Documents

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

Product Description

KEO Four-Flute Machine Countersinks.

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 90° 4-flute countersink used for?

The KEO 90° 4-flute countersink is used to create a conical recess for flat-head screws in metalworking and machining applications. Its 90° angle and cobalt construction suit hardened steels and stainless steel, providing clean, chatter-free countersinking in industrial manufacturing and maintenance.

What are the specifications of the KEO countersink 919-000-539?

The KEO countersink model 919-000-539 has a 90° included angle, 4 flutes, and a 1/2 in body diameter. It is made from cobalt steel for heat resistance and durability. The brand is KEO, and the part number is 919-000-539. It is designed for machine use in metalworking.

Where to buy the KEO 90° countersink worldwide?

You can source the KEO 90° countersink 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 genuine KEO cutting tools to industrial buyers internationally.

How to select the correct KEO countersink for your application?

To select the correct KEO countersink, match the angle (90° for flat-head screws) and body diameter to your fastener size. Choose cobalt for hard materials like stainless steel. Ensure the shank fits your machine tool holder. For general steel, high-speed steel may suffice, but KEO cobalt offers longer life in tough alloys.

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 four-flute machine countersinks. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
This KEO countersink features a 90° angle and four flutes for efficient deburring and chamfering of holes in metal, plastic, or wood. The cobalt construction provides heat resistance for extended tool life in machine applications. Body diameter is 3/4 in
KEO
This KEO countersink features a 90° angle and four flutes for efficient deburring and chamfering of holes in metal, plastic, or wood. The cobalt construction provides heat resistance for extended tool life in machine applications. Body diameter is 3/4 in
Four-flute machine countersink with a 90° included angle and 5/8 in body diameter. Made from cobalt steel for heat resistance. Used for deburring and chamfering holes in metal, creating a smooth seat for flat-head screws or removing sharp edges in machining and fabrication
KEO
Four-flute machine countersink with a 90° included angle and 5/8 in body diameter. Made from cobalt steel for heat resistance. Used for deburring and chamfering holes in metal, creating a smooth seat for flat-head screws or removing sharp edges in machining and fabrication
This KEO countersink has an 82° included angle, 4 flutes, and a 1-inch body diameter. Made from cobalt steel, it is designed for creating conical recesses for flat-head screws and deburring holes in metalworking applications
KEO
This KEO countersink has an 82° included angle, 4 flutes, and a 1-inch body diameter. Made from cobalt steel, it is designed for creating conical recesses for flat-head screws and deburring holes in metalworking applications
This KEO countersink features a 90° included angle and four flutes, with a 1-inch body diameter made from cobalt steel. It is used for deburring and chamfering holes in metal workpieces, creating a clean seat for flat-head screws. Suitable for drill presses, milling machines, or handheld tools in machining and fabrication applications
KEO
This KEO countersink features a 90° included angle and four flutes, with a 1-inch body diameter made from cobalt steel. It is used for deburring and chamfering holes in metal workpieces, creating a clean seat for flat-head screws. Suitable for drill presses, milling machines, or handheld tools in machining and fabrication applications
This KEO countersink features a 90° included angle and four flutes for smooth cutting. It has a 7/8 in body diameter and is made from cobalt steel. Used for deburring and chamfering holes in metal workpieces, creating a countersunk seat for flat-head screws
KEO
This KEO countersink features a 90° included angle and four flutes for smooth cutting. It has a 7/8 in body diameter and is made from cobalt steel. Used for deburring and chamfering holes in metal workpieces, creating a countersunk seat for flat-head screws
This 90° countersink features four flutes for efficient deburring and chamfering of holes in metal. The cobalt construction provides heat resistance for use in harder materials. With a 1 1/2 in body diameter and 3/4 in shank, it is designed for machine applications in general machining operations
KEO
This 90° countersink features four flutes for efficient deburring and chamfering of holes in metal. The cobalt construction provides heat resistance for use in harder materials. With a 1 1/2 in body diameter and 3/4 in shank, it is designed for machine applications in general machining operations

More from KEO

View all KEO parts →
This 90° countersink features four flutes for efficient chip evacuation and a TiN-coated cobalt construction for heat resistance. It is designed for machine use to create chamfers or countersinks in ferrous and non-ferrous materials, preparing holes for flat-head screws or deburring edges
KEO
This 90° countersink features four flutes for efficient chip evacuation and a TiN-coated cobalt construction for heat resistance. It is designed for machine use to create chamfers or countersinks in ferrous and non-ferrous materials, preparing holes for flat-head screws or deburring edges
This four-flute machine countersink is made from TiN coated cobalt, with a 1 1/2 in body diameter and 3/4 in shank. It is used for creating conical recesses for flat-head screws, deburring, and chamfering in metal, wood, or plastic. Suitable for CNC and manual machining operations
KEO
This four-flute machine countersink is made from TiN coated cobalt, with a 1 1/2 in body diameter and 3/4 in shank. It is used for creating conical recesses for flat-head screws, deburring, and chamfering in metal, wood, or plastic. Suitable for CNC and manual machining operations
This KEO countersink features a 60° included angle and four flutes for efficient chip evacuation. It has a 5/8 in body diameter and is made from TiN coated high speed steel to reduce friction. Commonly used in machining operations to create conical recesses for deburring or to allow flat-head fasteners to sit flush with the workpiece surface
KEO
This KEO countersink features a 60° included angle and four flutes for efficient chip evacuation. It has a 5/8 in body diameter and is made from TiN coated high speed steel to reduce friction. Commonly used in machining operations to create conical recesses for deburring or to allow flat-head fasteners to sit flush with the workpiece surface
This 60° four-flute machine countersink has a 1 1/4 in body diameter and is made from cobalt with an AlTiN coating. It is used to create conical recesses for flat-head screws and for deburring holes in metalworking operations
KEO
This 60° four-flute machine countersink has a 1 1/4 in body diameter and is made from cobalt with an AlTiN coating. It is used to create conical recesses for flat-head screws and for deburring holes in metalworking operations
This four-flute machine countersink is made from AlTiN coated high speed steel with a 2 in body diameter and a 3/4 in shank. Designed for creating 82° conical recesses in metal, plastic, or wood, it is suitable for use in drill presses or CNC machines for deburring and countersinking operations
KEO
This four-flute machine countersink is made from AlTiN coated high speed steel with a 2 in body diameter and a 3/4 in shank. Designed for creating 82° conical recesses in metal, plastic, or wood, it is suitable for use in drill presses or CNC machines for deburring and countersinking operations
This KEO countersink features four flutes and an 82° included angle, with a 1/2 in body diameter. It is constructed from cobalt steel with a TiN coating for wear resistance. Designed for deburring and countersinking holes in metal, it creates a smooth seat for flat-head screws and is suitable for use in drill presses and CNC machines
KEO
This KEO countersink features four flutes and an 82° included angle, with a 1/2 in body diameter. It is constructed from cobalt steel with a TiN coating for wear resistance. Designed for deburring and countersinking holes in metal, it creates a smooth seat for flat-head screws and is suitable for use in drill presses and CNC machines
This KEO countersink features a 90° included angle and four flutes for smooth, chatter-free cutting. With a 5/8 in body diameter and made from high-speed steel, it is designed for machine use to create conical recesses for flat-head screws or to deburr holes in metal, plastic, or wood
KEO
This KEO countersink features a 90° included angle and four flutes for smooth, chatter-free cutting. With a 5/8 in body diameter and made from high-speed steel, it is designed for machine use to create conical recesses for flat-head screws or to deburr holes in metal, plastic, or wood
This KEO countersink features a 60° included angle and four-flute design for smooth cutting and reduced chatter. With a 1 1/4 in body diameter and cobalt construction, it is suited for creating conical recesses for flathead screws or deburring holes in metal, including harder materials
KEO
This KEO countersink features a 60° included angle and four-flute design for smooth cutting and reduced chatter. With a 1 1/4 in body diameter and cobalt construction, it is suited for creating conical recesses for flathead screws or deburring holes in metal, including harder materials