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CHICAGO-LATROBE 3/8 in Body Dia Black Oxide High Speed Steel - General Purpose Three-Flute Countersinks
CHICAGO-LATROBEGeneral Purpose Three-Flute Countersinks

CHICAGO-LATROBE 3/8 in Body Dia Black Oxide High Speed Steel

The CHICAGO-LATROBE Countersink is a 100°, general purpose three-flute countersink made from black oxide high speed steel. It has a 3/8 in body diameter and is identified by manufacturer part number 56878.

SKU 3G-OTH-184670

Brand
CHICAGO-LATROBE
Item
3/8 in Body Dia Black Oxide High Speed Steel
Part Number
56878
Category
General Purpose Three-Flute Countersinks
Available to Order
Also known as:56878CHICAGO-LATROBE
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
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Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
56878
Type
Black Oxide High Speed Steel
Flute
3
Body Dia
3/8 in

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CHICAGO-LATROBE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The CHICAGO-LATROBE Countersink is a 100°, general purpose three-flute countersink made from black oxide high speed steel. It has a 3/8 in body diameter and is identified by manufacturer part number 56878.

Frequently Asked Questions

What is a CHICAGO-LATROBE 3-flute countersink used for?

A CHICAGO-LATROBE 3-flute countersink creates a 100° chamfer around a drilled hole to recess screw heads flush with the workpiece surface. It is used in metalworking, machining, and fabrication for deburring and preparing holes for flat-head fasteners.

What are the specifications of the CHICAGO-LATROBE 56878 countersink?

The CHICAGO-LATROBE 56878 is a general-purpose three-flute countersink with a 100° included angle. It has a 3/8 in body diameter and is made from black oxide high-speed steel. The black oxide coating provides wear resistance and reduces friction during use.

Where to buy CHICAGO-LATROBE countersinks worldwide?

3G Electric supplies CHICAGO-LATROBE countersinks worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on the 56878 or other CHICAGO-LATROBE tooling.

How to select the right countersink for a job?

Match the countersink angle to your fastener head angle — 100° is common for metric flat-head screws. Choose flute count based on material: 3-flute designs like the CHICAGO-LATROBE 56878 reduce chatter in steel and aluminum. Ensure body diameter clears the hole size without interference.

Used in

Common applications for CHICAGO-LATROBE
Aerospace manufacturing — Chicago-Latrobe NAS-spec jobber-length drill bits (e.g., MPN 42631) for drilling holes in airframe components.
Metal fabrication — Chicago-Latrobe single-flute countersinks (e.g., MPN 56774) for deburring and chamfering holes in steel plates.
Machine shop — Chicago-Latrobe 82° countersinks (e.g., MPN 56738) for creating flush-mount recesses for flat-head screws in assemblies.
Maintenance and repair — Chicago-Latrobe 90° countersinks (e.g., MPN 56760) for chamfering holes and removing burrs on industrial equipment.
Automotive production — Chicago-Latrobe HSS drill bits for holemaking in engine blocks and chassis components.
General machining — Chicago-Latrobe countersinks in various body diameters for chamfering and deburring in job shops.
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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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