Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
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
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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
919-000-539

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

KEO Four-Flute Machine Countersinks.

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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

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 smooth cutting and reduced chatter. Designed for machine use, it creates chamfers or countersinks in metal, plastic, or wood. The high-speed steel construction and 1/2 in body diameter suit general machining and fabrication tasks
KEO
This 90° countersink features four flutes for smooth cutting and reduced chatter. Designed for machine use, it creates chamfers or countersinks in metal, plastic, or wood. The high-speed steel construction and 1/2 in body diameter suit general machining and fabrication tasks
This KEO countersink features a 60° included angle and four flutes for efficient chip evacuation. The 3/4 in body diameter is made from cobalt steel for cutting harder materials. It is used to create conical recesses for flathead screws or to deburr holes in metal workpieces
KEO
This KEO countersink features a 60° included angle and four flutes for efficient chip evacuation. The 3/4 in body diameter is made from cobalt steel for cutting harder materials. It is used to create conical recesses for flathead screws or to deburr holes in metal workpieces
This four-flute machine countersink is made of TiN coated high speed steel with a 60° included angle. It has a 1-3/4 in body diameter and a 3/4 in shank. Designed for creating conical recesses for flathead screws or chamfering holes in metal, wood, or plastic
KEO
This four-flute machine countersink is made of TiN coated high speed steel with a 60° included angle. It has a 1-3/4 in body diameter and a 3/4 in shank. Designed for creating conical recesses for flathead screws or chamfering holes in metal, wood, or plastic
This 82° countersink features four flutes for smooth cutting and efficient chip evacuation. The TiN-coated high-speed steel construction provides wear resistance. It is used for creating conical recesses for flat-head screws and deburring holes in machining operations
KEO
This 82° countersink features four flutes for smooth cutting and efficient chip evacuation. The TiN-coated high-speed steel construction provides wear resistance. It is used for creating conical recesses for flat-head screws and deburring holes in machining operations
This four-flute countersink creates a conical recess for flat-head screws in metalworking. The 82° angle matches standard screw heads. TiN-coated cobalt construction provides heat resistance for production machining. Suitable for deburring and countersinking on ferrous and non-ferrous materials
KEO
This four-flute countersink creates a conical recess for flat-head screws in metalworking. The 82° angle matches standard screw heads. TiN-coated cobalt construction provides heat resistance for production machining. Suitable for deburring and countersinking on ferrous and non-ferrous materials
This four-flute machine countersink is made from AlTiN coated cobalt for heat resistance and wear protection. It has a 1-1/2 in body diameter and 3/4 in shank, designed for precision chamfering and deburring in industrial machining applications
KEO
This four-flute machine countersink is made from AlTiN coated cobalt for heat resistance and wear protection. It has a 1-1/2 in body diameter and 3/4 in shank, designed for precision chamfering and deburring in industrial machining applications
This four-flute machine countersink has an 82° included angle, 1 1/2 in body diameter, and 3/4 in shank. Made from cobalt steel, it is used to create conical recesses for flat-head screws in metal, suitable for high-speed machining of hardened steels and alloys
KEO
This four-flute machine countersink has an 82° included angle, 1 1/2 in body diameter, and 3/4 in shank. Made from cobalt steel, it is used to create conical recesses for flat-head screws in metal, suitable for high-speed machining of hardened steels and alloys
This KEO countersink features a 60° included angle and four flutes for efficient deburring and chamfering. The TiN-coated cobalt substrate provides heat resistance and extended tool life. With a 1/2 in body diameter, it is suitable for creating conical recesses for flathead screws or deburring holes in metal, plastic, or wood
KEO
This KEO countersink features a 60° included angle and four flutes for efficient deburring and chamfering. The TiN-coated cobalt substrate provides heat resistance and extended tool life. With a 1/2 in body diameter, it is suitable for creating conical recesses for flathead screws or deburring holes in metal, plastic, or wood