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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 is a threaded-shank three-flute countersink with a 100° angle, 3 flutes, and a 1/2 in body diameter. It features a 1/4"-28 shank thread size and is identified by manufacturer part…

SKU 3G-OTH-186101

Also listed as: 954HS521 · 954HS5 21

Brand
ROCKY MOUNTAIN TWIST
Item
Threaded-Shank Three-Flute Countersink
Category
Threaded-Shank Three-Flute Countersinks
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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
954HS5-21
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 is a threaded-shank three-flute countersink with a 100° angle, 3 flutes, and a 1/2 in body diameter. It features a 1/4"-28 shank thread size and is identified by manufacturer part number 954HS5-21.

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 used for?

The ROCKY MOUNTAIN TWIST Countersink is used to create a conical recess for flat-head screws in metal or wood. Its 100° angle and three-flute design provide smooth, chatter-free cutting. It is commonly used in aerospace, automotive, and general machining applications where precise countersinking is required.

What are the specifications of the ROCKY MOUNTAIN TWIST Countersink?

The ROCKY MOUNTAIN TWIST Countersink has a 100° included angle, 3 flutes, a 1/2 in body diameter, and a 1/4"-28 shank thread size. The manufacturer part number is 954HS5-21. It is a threaded-shank three-flute countersink designed for use with compatible holders or drill chucks.

Where to buy the ROCKY MOUNTAIN TWIST Countersink worldwide?

3G Electric supplies the ROCKY MOUNTAIN TWIST 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. We source and deliver this countersink to support your machining operations.

How to select the correct ROCKY MOUNTAIN TWIST Countersink?

Select the ROCKY MOUNTAIN TWIST Countersink based on your screw head angle and material. The 100° angle matches common flat-head screws. Ensure your tool holder accepts a 1/4"-28 threaded shank. For hard materials, choose a countersink with appropriate flute geometry. 3G Electric can help you confirm 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

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
This cobalt threaded-shank drill bit features a #1 diameter of 0.2280 inches with a 1/4"-28 thread size and 5/8" overall length. The black oxide finish provides enhanced lubricity and chip flow. Conforms to NAS 965 Type D standards. Suitable for precision drilling in hardened materials and high-tolerance hole-making applications
ROCKY MOUNTAIN TWIST
This cobalt threaded-shank drill bit features a #1 diameter of 0.2280 inches with a 1/4"-28 thread size and 5/8" overall length. The black oxide finish provides enhanced lubricity and chip flow. Conforms to NAS 965 Type D standards. Suitable for precision drilling in hardened materials and high-tolerance hole-making applications
Cobalt threaded-shank drill bit with a 0.2570-inch diameter (Letter F) and 1/4"/28 thread size. Overall length 13/32". Black oxide finish. Meets NAS 965 Type D specifications. Used for precision drilling in applications requiring secure mounting in tool holders
ROCKY MOUNTAIN TWIST
Cobalt threaded-shank drill bit with a 0.2570-inch diameter (Letter F) and 1/4"/28 thread size. Overall length 13/32". Black oxide finish. Meets NAS 965 Type D specifications. Used for precision drilling in applications requiring secure mounting in tool holders
Cobalt threaded-shank drill bit with a #24 wire gauge diameter (0.1520 inch) and 1/4-28 thread. Black oxide finish. Overall length 9/16 inch. Conforms to NAS 965 Type D. Used for precision drilling in metal alloys where secure shank retention is required
ROCKY MOUNTAIN TWIST
Cobalt threaded-shank drill bit with a #24 wire gauge diameter (0.1520 inch) and 1/4-28 thread. Black oxide finish. Overall length 9/16 inch. Conforms to NAS 965 Type D. Used for precision drilling in metal alloys where secure shank retention is required
This cobalt threaded-shank drill bit has a #2 size with 0.2210-inch diameter and 1/4-28 thread. It features a black oxide finish and conforms to NAS 965 Type D. Overall length is 13/32". Used for precision drilling in high-strength materials where a secure threaded shank is required
ROCKY MOUNTAIN TWIST
This cobalt threaded-shank drill bit has a #2 size with 0.2210-inch diameter and 1/4-28 thread. It features a black oxide finish and conforms to NAS 965 Type D. Overall length is 13/32". Used for precision drilling in high-strength materials where a secure threaded shank is required
This #21 cobalt threaded-shank drill bit has a 0.1590-inch diameter and 1/4"-28 thread size, with an overall length of 13/32". The black oxide finish provides increased lubricity and corrosion resistance. Designed for precision drilling in applications requiring secure threaded shank mounting, such as in aerospace and industrial tooling
ROCKY MOUNTAIN TWIST
This #21 cobalt threaded-shank drill bit has a 0.1590-inch diameter and 1/4"-28 thread size, with an overall length of 13/32". The black oxide finish provides increased lubricity and corrosion resistance. Designed for precision drilling in applications requiring secure threaded shank mounting, such as in aerospace and industrial tooling
This carbide countersink features three flutes and a 100° angle for creating countersunk holes in metal or plastic. With a 7/16 in body diameter and 1/4"-28 threaded shank, it is designed for use in threaded-shank toolholders. Suitable for deburring and chamfering operations in machining and fabrication
This carbide countersink features three flutes and a 100° angle for creating countersunk holes in metal or plastic. With a 7/16 in body diameter and 1/4"-28 threaded shank, it is designed for use in threaded-shank toolholders. Suitable for deburring and chamfering operations in machining and fabrication

More from ROCKY MOUNTAIN TWIST

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This three-flute countersink features a 100° included angle and a 1/2 in body diameter with a 1/4"-28 threaded shank. Constructed from black oxide cobalt, it is suited for creating conical recesses for flat-head screws and for deburring or chamfering holes in ferrous materials during machining operations
ROCKY MOUNTAIN TWIST
This three-flute countersink features a 100° included angle and a 1/2 in body diameter with a 1/4"-28 threaded shank. Constructed from black oxide cobalt, it is suited for creating conical recesses for flat-head screws and for deburring or chamfering holes in ferrous materials during machining operations
This three-flute countersink features a 100° included angle and a 1/2 in body diameter. The threaded shank measures 1/4"-28. It is used to create conical recesses for fastener heads in metalworking and assembly applications
ROCKY MOUNTAIN TWIST
This three-flute countersink features a 100° included angle and a 1/2 in body diameter. The threaded shank measures 1/4"-28. It is used to create conical recesses for fastener heads in metalworking and assembly applications
This three-flute countersink has a 1/2 in body diameter and a 1/4"-28 threaded shank for secure mounting. The black oxide cobalt finish provides heat resistance. It is used to create a conical recess for flat-head screws in metalworking and woodworking applications
ROCKY MOUNTAIN TWIST
This three-flute countersink has a 1/2 in body diameter and a 1/4"-28 threaded shank for secure mounting. The black oxide cobalt finish provides heat resistance. It is used to create a conical recess for flat-head screws in metalworking and woodworking applications
Three-flute countersink with a 100° angle and 1/2 in body diameter, featuring a 1/4"-28 threaded shank. Designed for creating chamfers around pre-drilled holes in metal, wood, or composite materials, allowing screw heads to sit flush or below the surface
ROCKY MOUNTAIN TWIST
Three-flute countersink with a 100° angle and 1/2 in body diameter, featuring a 1/4"-28 threaded shank. Designed for creating chamfers around pre-drilled holes in metal, wood, or composite materials, allowing screw heads to sit flush or below the surface
This 100° countersink features three flutes for smooth cutting and reduced chatter. The black oxide cobalt finish provides wear resistance for use on harder materials. It has a 1/2 in body diameter and a 1/4"-28 threaded shank for use with compatible holders or machines. Commonly used to create conical recesses for flat-head screws in metalworking and machining applications
ROCKY MOUNTAIN TWIST
This 100° countersink features three flutes for smooth cutting and reduced chatter. The black oxide cobalt finish provides wear resistance for use on harder materials. It has a 1/2 in body diameter and a 1/4"-28 threaded shank for use with compatible holders or machines. Commonly used to create conical recesses for flat-head screws in metalworking and machining applications
Threaded-shank three-flute countersink with 100° included angle, 1/2 in body diameter, and 1/4"-28 shank thread. Designed for creating conical recesses for flat-head screws in metal or wood. Three-flute design reduces chatter for smoother cutting
ROCKY MOUNTAIN TWIST
Threaded-shank three-flute countersink with 100° included angle, 1/2 in body diameter, and 1/4"-28 shank thread. Designed for creating conical recesses for flat-head screws in metal or wood. Three-flute design reduces chatter for smoother cutting
This three-flute countersink has a 1/2 in body diameter and a 1/4"-28 threaded shank. The black oxide cobalt finish provides heat resistance. It is used to create a conical recess for flat-head screws in metalworking and woodworking applications
ROCKY MOUNTAIN TWIST
This three-flute countersink has a 1/2 in body diameter and a 1/4"-28 threaded shank. The black oxide cobalt finish provides heat resistance. It is used to create a conical recess for flat-head screws in metalworking and woodworking applications