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
Need installation or engineering help?
Ask a question
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 TWISTROCKY 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.














