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ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank - Threaded-Shank Three-Flute Countersinks
ROCKY MOUNTAIN TWISTThreaded-Shank Three-Flute Countersinks

ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank

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
Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank
Category
Threaded-Shank Three-Flute Countersinks
Available to Order
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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

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

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. 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 — 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

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 1/4", 9/16" Overall Lg, Black Oxide HSS (MPN 953HS1/4ST)
ROCKY MOUNTAIN TWIST
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 1/4", 9/16" Overall Lg, Black Oxide HSS (MPN 953HS1/4ST)
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #1, 1-1/4" Overall Lg, Black Oxide Cobalt (MPN 953CO1SS)
ROCKY MOUNTAIN TWIST
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #1, 1-1/4" Overall Lg, Black Oxide Cobalt (MPN 953CO1SS)
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 1/4", 13/32" Overall Lg, Black Oxide HSS (MPN 953HS1/4VS)
ROCKY MOUNTAIN TWIST
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 1/4", 13/32" Overall Lg, Black Oxide HSS (MPN 953HS1/4VS)
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 1/4", 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS1/4SS)
ROCKY MOUNTAIN TWIST
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 1/4", 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS1/4SS)
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 1/4", 2-1/8" Overall Lg, Black Oxide HSS (MPN 953HS1/4LS)
ROCKY MOUNTAIN TWIST
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 1/4", 2-1/8" Overall Lg, Black Oxide HSS (MPN 953HS1/4LS)
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 1/4", 1-1/4" Overall Lg, Black Oxide Cobalt (MPN 953CO1/4SS)
ROCKY MOUNTAIN TWIST
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 1/4", 1-1/4" Overall Lg, Black Oxide Cobalt (MPN 953CO1/4SS)

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