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. This black oxide cobalt tool, model 954CO5-21, is designed for…
SKU 3G-OTH-186100
Also listed as: 954CO521 · 954CO5 21
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
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. 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 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.
