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ROCKY MOUNTAIN TWIST 953CO3/8ST Cobalt Threaded-Shank Drill Bit - Cobalt Threaded-Shank Drill Bits
ROCKY MOUNTAIN TWISTCobalt Threaded-Shank Drill Bits

ROCKY MOUNTAIN TWIST 953CO3/8ST Cobalt Threaded-Shank Drill Bit

The ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 3/8" is a cobalt threaded-shank drill bit with a 0.3750-inch diameter and a 1/4"-28 thread size. It features a black oxide finish and meets NAS 965 Type D…

SKU 3G-OTH-195659

Also listed as: 953CO38ST · 953CO3 8ST · 953CO3-8ST

Brand
ROCKY MOUNTAIN TWIST
Item
953CO3/8ST Cobalt Threaded-Shank Drill Bit
Category
Cobalt Threaded-Shank Drill Bits
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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
953CO3/8ST
Type
Black Oxide Cobalt
Overall Lg
5/8"

Technical Documents

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ROCKY MOUNTAIN TWIST Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 3/8" is a cobalt threaded-shank drill bit with a 0.3750-inch diameter and a 1/4"-28 thread size. It features a black oxide finish and meets NAS 965 Type D specifications, with an overall length of 5/8" (MPN 953CO3/8ST).

Frequently Asked Questions

What is the ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit used for?

This 3/8" cobalt threaded-shank drill bit is designed for precision drilling in aerospace and industrial applications. Its 1/4"-28 thread allows secure mounting in tool holders, while the black oxide cobalt construction provides heat resistance and durability for tough materials like stainless steel and titanium.

What are the specifications of the ROCKY MOUNTAIN TWIST 953CO3/8ST drill bit?

The ROCKY MOUNTAIN TWIST 953CO3/8ST is a 3/8" diameter threaded-shank drill bit with a 1/4"-28 thread size, 5/8" overall length, and black oxide cobalt finish. It meets NAS 965 Type D specifications, ensuring compatibility with standard aerospace tooling systems.

Where to buy ROCKY MOUNTAIN TWIST drill bits worldwide?

3G Electric supplies ROCKY MOUNTAIN TWIST threaded-shank drill bits worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this NAS 965 Type D bit to your facility. Contact us for pricing and lead time on the 953CO3/8ST.

How to select the correct threaded-shank drill bit for aerospace work?

For aerospace drilling, match the thread size (e.g., 1/4"-28) to your tool holder and choose a diameter like 3/8" for fastener holes. Cobalt steel with black oxide finish, as on the ROCKY MOUNTAIN TWIST 953CO3/8ST, handles high temperatures. Verify NAS 965 Type D compliance for standard aerospace tolerances.

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 cobalt threaded-shank drill bits. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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This cobalt threaded-shank drill bit has a 3/8" diameter with a 1/4"-28 thread size and an overall length of 1-1/4". The black oxide finish reduces friction during drilling. It conforms to NAS 965 Type D, making it suitable for precision drilling in high-strength materials
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This cobalt threaded-shank drill bit has a 3/8" diameter with a 1/4"-28 thread size and an overall length of 1-1/4". The black oxide finish reduces friction during drilling. It conforms to NAS 965 Type D, making it suitable for precision drilling in high-strength materials
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Cobalt threaded-shank drill bit with 0.3125" diameter, 1/4"-28 thread size, and 5/8" overall length. Black oxide finish. Conforms to NAS 965 Type D. Used for precision drilling in applications requiring secure retention in tool holders, such as in aerospace and industrial machining of high-strength materials
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Cobalt threaded-shank drill bit with 0.3125" diameter, 1/4"-28 thread size, and 5/8" overall length. Black oxide finish. Conforms to NAS 965 Type D. Used for precision drilling in applications requiring secure retention in tool holders, such as in aerospace and industrial machining of high-strength materials
Cobalt threaded-shank drill bit with a 0.3750" diameter and 1/4"-28 thread size. Overall length is 2-1/8". Black oxide finish. Meets NAS 965 Type D specifications. Used for drilling precision holes in hardened materials such as stainless steel and titanium, and for secure mounting in tool holders for machining applications
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Cobalt threaded-shank drill bit with a 0.3750" diameter and 1/4"-28 thread size. Overall length is 2-1/8". Black oxide finish. Meets NAS 965 Type D specifications. Used for drilling precision holes in hardened materials such as stainless steel and titanium, and for secure mounting in tool holders for machining applications
This cobalt threaded-shank drill bit has a 1/8" diameter and a 1/4"-28 thread size. It features a black oxide finish and a 9/16" overall length. Designed for precision drilling in applications requiring secure tool holding, it meets NAS 965 Type D specifications
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This cobalt threaded-shank drill bit has a 1/8" diameter and a 1/4"-28 thread size. It features a black oxide finish and a 9/16" overall length. Designed for precision drilling in applications requiring secure tool holding, it meets NAS 965 Type D specifications
Black oxide cobalt threaded-shank drill bit with 1/4" diameter and 1/4"-28 thread size. Overall length 9/16". Meets NAS 965 Type D specifications. Used for precision drilling in applications requiring secure mounting in tool holders, suitable for hard metals
ROCKY MOUNTAIN TWIST
Black oxide cobalt threaded-shank drill bit with 1/4" diameter and 1/4"-28 thread size. Overall length 9/16". Meets NAS 965 Type D specifications. Used for precision drilling in applications requiring secure mounting in tool holders, suitable for hard metals

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This cobalt threaded-shank drill bit has a 5/16" diameter with a 1/4"-28 thread size and a 2-1/8" overall length. The black oxide finish provides surface protection. It is used for drilling operations requiring secure shank retention in industrial machining applications
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This #10 cobalt threaded-shank drill bit has a 0.1935-inch diameter and 13/32" overall length. The 1/4"-28 threaded shank enables secure mounting in tool holders. Black oxide finish provides surface protection. Suitable for drilling in hard metals and aerospace alloys
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