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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-186097

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

ROCKY MOUNTAIN TWIST
Manufacturer Part Number
954CO5-40
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 954CO5-40.

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 the ROCKY MOUNTAIN TWIST Countersink: 100° used for?

This countersink is used to create a conical recess for flat-head screws in metalworking and woodworking applications. The 100° angle is common in aerospace and precision machining. Its three-flute design provides smooth cutting and reduced chatter, making it suitable for production environments.

What are the specifications of the ROCKY MOUNTAIN TWIST Countersink: 100°?

The ROCKY MOUNTAIN TWIST Countersink: 100° has a 1/2 in body diameter and a 1/4"-28 shank thread size. It features a black oxide cobalt finish for heat resistance and durability. The manufacturer part number is 954CO5-40. It is a three-flute, threaded-shank countersink designed for precision countersinking.

Where to buy the ROCKY MOUNTAIN TWIST Countersink: 100° worldwide?

You can source the ROCKY MOUNTAIN TWIST Countersink: 100° through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply this countersink to customers across multiple industries.

How to select the correct ROCKY MOUNTAIN TWIST Countersink: 100°?

Select this countersink by matching the shank thread size (1/4"-28) to your tool holder or drill. Ensure the 100° angle matches your screw head requirement. The 1/2 in body diameter suits medium-depth countersinking. For hard materials, the black oxide cobalt finish provides extended tool life. Always verify the manufacturer part number 954CO5-40.

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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ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank, Black Oxide Cobalt (MPN 954CO5-21). Key specifications — Shank Thread Size: 1/4"-28; Brand: ROCKY MOUNTAIN TWIST.
ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank (MPN 954HS5-40). Key specifications — Shank Thread Size: 1/4"-28; Brand: ROCKY MOUNTAIN TWIST.
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ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank (MPN 954HS5-40). Key specifications — Shank Thread Size: 1/4"-28; Brand: ROCKY MOUNTAIN TWIST.
ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank, Black Oxide Cobalt (MPN 954CO5-10). Key specifications — Shank Thread Size: 1/4"-28; Brand: ROCKY MOUNTAIN TWIST.
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ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank, Black Oxide Cobalt (MPN 954CO5-10). Key specifications — Shank Thread Size: 1/4"-28; Brand: ROCKY MOUNTAIN TWIST.
ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank (MPN 954HS5-10). Key specifications — Shank Thread Size: 1/4"-28; Brand: ROCKY MOUNTAIN TWIST.
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ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank, Black Oxide Cobalt (MPN 954CO5-30). Key specifications — Shank Thread Size: 1/4"-28; Brand: ROCKY MOUNTAIN TWIST.
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ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank, Black Oxide Cobalt (MPN 954CO5-30). Key specifications — Shank Thread Size: 1/4"-28; Brand: ROCKY MOUNTAIN TWIST.
ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank (MPN 954HS5-30). Key specifications — Shank Thread Size: 1/4"-28; Brand: ROCKY MOUNTAIN TWIST.
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ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank (MPN 954HS5-30). Key specifications — Shank Thread Size: 1/4"-28; Brand: ROCKY MOUNTAIN TWIST.
ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank (MPN 954HS5-21). Key specifications — Shank Thread Size: 1/4"-28; Brand: ROCKY MOUNTAIN TWIST.
ROCKY MOUNTAIN TWIST
ROCKY MOUNTAIN TWIST Countersink: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank (MPN 954HS5-21). Key specifications — Shank Thread Size: 1/4"-28; Brand: ROCKY MOUNTAIN TWIST.