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ROCKY MOUNTAIN TWIST 100° Threaded-Shank Three-Flute Countersink - Threaded-Shank Three-Flute Countersinks
ROCKY MOUNTAIN TWISTThreaded-Shank Three-Flute Countersinks

ROCKY MOUNTAIN TWIST 100° Threaded-Shank Three-Flute Countersink

The ROCKY MOUNTAIN TWIST Countersink: 100° is a threaded-shank three-flute countersink with a 1/2 in body diameter and a 1/4"-28 shank thread size. It features a black oxide cobalt finish and is identified by…

SKU 3G-OTH-186099

Also listed as: 954CO530 · 954CO5 30

Brand
ROCKY MOUNTAIN TWIST
Item
100° Threaded-Shank Three-Flute Countersink
Part Number
954CO5-30
Category
Threaded-Shank Three-Flute Countersinks
Available to Order
Also known as:954CO5-30ROCKY MOUNTAIN TWIST
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Local availability & support — Singapore

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

ROCKY MOUNTAIN TWIST
Manufacturer Part Number
954CO5-30
Type
Black Oxide Cobalt
Flute
3
Shank
1/4"-28
Body Dia
1/2 in
Shank Thread Size
1/4"-28

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ROCKY MOUNTAIN TWIST Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The ROCKY MOUNTAIN TWIST Countersink: 100° is a threaded-shank three-flute countersink with a 1/2 in body diameter and a 1/4"-28 shank thread size. It features a black oxide cobalt finish and is identified by manufacturer part number 954CO5-30.

Frequently Asked Questions

What is the ROCKY MOUNTAIN TWIST 100° countersink used for?

This 100° countersink is used to create a conical recess for flat-head screws in metalworking and machining applications. The three-flute design provides smooth cutting and reduced chatter, while the black oxide cobalt finish enhances wear resistance for use on harder materials like stainless steel.

What are the specifications of the ROCKY MOUNTAIN TWIST 954CO5-30 countersink?

The ROCKY MOUNTAIN TWIST 954CO5-30 is a 100° countersink with a 1/2 in body diameter and a 1/4"-28 threaded shank. It has three flutes, a black oxide cobalt finish, and is designed for use with compatible threaded holders or machines. The shank thread size is 1/4"-28.

Where to buy the ROCKY MOUNTAIN TWIST 954CO5-30 countersink worldwide?

3G Electric supplies the ROCKY MOUNTAIN TWIST 954CO5-30 countersink worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this threaded-shank three-flute countersink.

How to select the correct ROCKY MOUNTAIN TWIST countersink for my application?

Select based on screw head angle (100° for flat-head screws), body diameter matching the screw head size, and shank thread size (1/4"-28) compatible with your tool holder. The three-flute design and black oxide cobalt finish suit harder materials. Verify the manufacturer part number 954CO5-30 for exact specs.

Used in

Common applications for ROCKY MOUNTAIN TWIST
Aerospace assembly — NAS 965 Type B compliant threaded-shank drill bits for drilling rivet holes in aluminum and titanium structures.
Automotive maintenance — #11 and #12 threaded-shank drill bits for repairing threaded holes and drilling out broken fasteners in engine blocks.
General metal fabrication — 1/4" diameter threaded-shank drill bits for creating precise holes in steel plates and profiles.
CNC machining — fractional and numbered threaded-shank drill bits mounted in quick-change tool holders for high-volume drilling.
Tool and die making — 5/32" and 7/32" threaded-shank drill bits for drilling water lines and ejector pin holes in mold bases.
Maintenance and repair — #35 and #4 threaded-shank drill bits for precision drilling in confined spaces using portable magnetic drill presses.
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ROCKY MOUNTAIN TWIST Products

3G Electric supplies ROCKY MOUNTAIN TWIST threaded-shank 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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