CHICAGO-LATROBEGeneral Purpose Three-Flute Countersinks

CHICAGO-LATROBE Countersink: 90°, 3 Flute, 3/8 in Body Dia

The CHICAGO-LATROBE Countersink is a 90° general purpose three-flute countersink made from black oxide high speed steel. It features a 3/8 in body diameter and is identified by manufacturer part number 56858.

SKU 3G-OTH-184990

Brand

CHICAGO-LATROBE

Item

Countersink: 90°, 3 Flute, 3/8 in Body Dia

Local availability & support

Delivery: Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment: Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

CHICAGO-LATROBE

Manufacturer Part Number

56858

Type

Black Oxide High Speed Steel 

Flute

3

Body Dia

3/8 in 

Technical Documents

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CHICAGO-LATROBE Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Frequently Asked Questions

What is the CHICAGO-LATROBE 56858 countersink used for?

The CHICAGO-LATROBE 56858 is a general-purpose three-flute countersink used to create a 90° chamfer or countersink hole in metal, wood, or plastic. It is commonly applied in deburring drilled holes and preparing surfaces for flat-head screws in industrial manufacturing and maintenance.

What are the specifications of the CHICAGO-LATROBE 56858 countersink?

The CHICAGO-LATROBE 56858 is a 90° countersink with 3 flutes, a 3/8 in body diameter, and is made from black oxide high-speed steel. The manufacturer part number is 56858. It is designed for general-purpose use in deburring and chamfering operations.

Where to buy CHICAGO-LATROBE 56858 countersinks worldwide?

3G Electric supplies the CHICAGO-LATROBE 56858 countersink worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this tool for your operations.

How to select the right CHICAGO-LATROBE countersink for my job?

Select a CHICAGO-LATROBE countersink based on the required chamfer angle, material, and hole size. For general-purpose work, the 90° three-flute black oxide high-speed steel model (MPN 56858) suits most metals and plastics. Match the body diameter to your workpiece clearance and desired chamfer depth.

Used in

Common applications for CHICAGO-LATROBE

Aerospace assembly — Chicago-Latrobe NAS 907 Type B aircraft-extension drill bits for drilling fastener holes in aluminum and titanium skins.

Metal fabrication — Chicago-Latrobe reduced-shank drill bit sets for enlarging holes in structural steel using magnetic drill presses.

Maintenance repair — Chicago-Latrobe left-hand cobalt jobber-length drill bits for removing broken bolts in machinery.

Tool and die making — Chicago-Latrobe jobber-length drill bit sets with 135° split point for precision hole drilling in hardened steels.

Automotive repair — Chicago-Latrobe spiral-flute screw extractors for removing seized fasteners in engine blocks or exhaust systems.

General manufacturing — Chicago-Latrobe HSS jobber-length drill bits for production drilling in mild steel and cast iron.

CHICAGO-LATROBE Products

3G Electric supplies CHICAGO-LATROBE general purpose three-flute countersinks. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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