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

ROCKY MOUNTAIN TWIST 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. This black oxide cobalt tool, model 954CO5-21, is designed for…

SKU 3G-OTH-186100

Also listed as: 954CO521 · 954CO5 21

Brand
ROCKY MOUNTAIN TWIST
Item
Threaded-Shank Three-Flute Countersink
Part Number
954CO5-21
Category
Threaded-Shank Three-Flute Countersinks
Available to Order
Also known as:954CO5-21ROCKY MOUNTAIN TWIST
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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

ROCKY MOUNTAIN TWIST
Manufacturer Part Number
954CO5-21
Type
Black Oxide Cobalt
Flute
3
Shank
1/4"-28
Body Dia
1/2 in
Shank Thread Size
1/4"-28

Technical Documents

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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. This black oxide cobalt tool, model 954CO5-21, is designed for precise countersinking operations.

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 a ROCKY MOUNTAIN TWIST 100° countersink used for?

This 100° countersink creates a conical recess for flat-head screws in metalworking. Its three-flute design and black oxide cobalt construction suit precision deburring and chamfering on ferrous materials, ensuring clean, chatter-free finishes in machining operations.

What are the specifications of the ROCKY MOUNTAIN TWIST 954CO5-21 countersink?

The ROCKY MOUNTAIN TWIST 954CO5-21 is a 100° countersink with a 1/2 in body diameter, 1/4"-28 threaded shank, and three flutes. It is made from black oxide cobalt for durability and heat resistance, designed for threaded-shank holders in industrial drilling applications.

Where to buy ROCKY MOUNTAIN TWIST countersinks worldwide?

3G Electric supplies ROCKY MOUNTAIN TWIST countersinks worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on the 954CO5-21 or other threaded-shank countersinks.

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

Match the countersink angle (100°) to your screw head angle. Ensure the 1/4"-28 threaded shank fits your holder. For hard metals, black oxide cobalt provides wear resistance. Confirm body diameter (1/2 in) clears the hole size. 3G Electric can help you verify compatibility.

Used in

Common applications for ROCKY MOUNTAIN TWIST
Aerospace assembly — Rocky Mountain Twist NAS 965 Type D cobalt drill bits for drilling titanium airframe components
Automotive production line — Rocky Mountain Twist HSS threaded-shank drill bits for quick-change drilling in aluminum engine blocks
Heavy equipment maintenance — Rocky Mountain Twist cobalt drill bits for drilling hardened steel in field repair kits
Precision machining — Rocky Mountain Twist HSS drill bits in wire gauge sizes for jig and fixture drilling
Portable drilling operations — Rocky Mountain Twist threaded-shank drill bits for use with magnetic drill stands in structural steel fabrication
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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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