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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 5/16", 1-1/4" Overall Lg - Cobalt Threaded-Shank Drill Bits
ROCKY MOUNTAIN TWISTCobalt Threaded-Shank Drill Bits

ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 5/16", 1-1/4" Overall Lg

The ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 5/16" is a cobalt threaded-shank drill bit with a 0.3125 inch diameter and a 1/4"-28 thread size. It features a black oxide finish and meets NAS 965 Type D…

SKU 3G-OTH-196527

Also listed as: 953CO516SS · 953CO5 16SS · 953CO5-16SS

Brand
ROCKY MOUNTAIN TWIST
Item
Threaded Shank Drill Bit: 5/16", 1-1/4" Overall Lg
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
953CO5/16SS
Type
Black Oxide Cobalt
Overall Lg
1-1/4"

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: 5/16" is a cobalt threaded-shank drill bit with a 0.3125 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 1-1/4 inches (MPN 953CO5/16SS).

Frequently Asked Questions

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

This 5/16" cobalt drill bit with a 1/4"-28 threaded shank is designed for precision drilling in aerospace and industrial applications requiring NAS 965 Type D compliance. 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 953CO5/16SS drill bit?

The ROCKY MOUNTAIN TWIST 953CO5/16SS is a 5/16" (0.3125 inch) diameter threaded shank drill bit with a 1/4"-28 thread size, 1-1/4" overall length, black oxide cobalt finish, and meets NAS 965 Type D specifications.

Where to buy ROCKY MOUNTAIN TWIST threaded shank drill bits worldwide?

3G Electric supplies ROCKY MOUNTAIN TWIST threaded shank drill bits worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on the 953CO5/16SS.

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, ensure the diameter (e.g., 5/16") meets hole specs, and verify material compatibility. Cobalt bits with black oxide finish, like the ROCKY MOUNTAIN TWIST 953CO5/16SS, suit high-strength alloys. Always confirm NAS 965 Type D compliance.

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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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 5/16", 2-1/8" Overall Lg, Black Oxide Cobalt (MPN 953CO5/16LS)
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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
This cobalt threaded-shank drill bit has a 0.2500-inch diameter with a 1/4-28 thread size and 2-1/8" overall length. The black oxide finish provides enhanced surface hardness. It meets NAS 965 Type D specifications and is used for drilling precision holes in hardened materials such as stainless steel and titanium in industrial applications
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This cobalt threaded-shank drill bit has a 0.2500-inch diameter with a 1/4-28 thread size and 2-1/8" overall length. The black oxide finish provides enhanced surface hardness. It meets NAS 965 Type D specifications and is used for drilling precision holes in hardened materials such as stainless steel and titanium in industrial applications
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This cobalt threaded-shank drill bit has a 0.2500" diameter and 1/4"-28 thread size. The black oxide finish reduces friction during drilling. Overall length is 13/32". It meets NAS 965 Type D specifications for use in precision drilling applications
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This 7/32" (0.2188 inch) diameter cobalt drill bit features a 1/4"-28 threaded shank for secure tool holding in precision drilling applications. With a 1-1/4" overall length and black oxide finish, it is suited for use in machining high-strength materials. Conforms to NAS 965 Type D specifications

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This cobalt threaded-shank drill bit has a 0.2500-inch diameter and a 1/4-28 thread size for secure mounting in tool holders. The black oxide finish provides lubricity and corrosion resistance. With an overall length of 1-1/4 inches, it meets NAS 965 Type D specifications. Used for drilling precision holes in hard metals and aerospace-grade materials in industrial machining and maintenance applications
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This cobalt threaded-shank drill bit has a 0.2500-inch diameter and a 1/4-28 thread size for secure mounting in tool holders. The black oxide finish provides lubricity and corrosion resistance. With an overall length of 1-1/4 inches, it meets NAS 965 Type D specifications. Used for drilling precision holes in hard metals and aerospace-grade materials in industrial machining and maintenance applications
Cobalt threaded-shank drill bit with a #25 diameter (0.1495 inches) and 1/4-28 thread size. Overall length is 1-1/4 inches. Black oxide finish provides heat resistance and lubricity. Conforms to NAS 965 Type D. Used for precision drilling in hardened materials, typically in tool holders for high-torque operations
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Cobalt threaded-shank drill bit with a #25 diameter (0.1495 inches) and 1/4-28 thread size. Overall length is 1-1/4 inches. Black oxide finish provides heat resistance and lubricity. Conforms to NAS 965 Type D. Used for precision drilling in hardened materials, typically in tool holders for high-torque operations
Cobalt threaded-shank drill bit with a 0.2380-inch diameter (Letter B) and 1/4"-28 thread size. Features a black oxide finish and 9/16" overall length. Conforms to NAS 965 Type D specification. Used for precision drilling in hard metals where secure mounting in tool holders is required
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Cobalt threaded-shank drill bit with a 0.2380-inch diameter (Letter B) and 1/4"-28 thread size. Features a black oxide finish and 9/16" overall length. Conforms to NAS 965 Type D specification. Used for precision drilling in hard metals where secure mounting in tool holders is required
This #7 cobalt threaded-shank drill bit has a 0.2010-inch diameter and a 1/4"-28 thread size. It features a black oxide finish and meets NAS 965 Type D specifications. The overall length is 13/32". Threaded-shank drill bits are used in tool holders for precision drilling in metalworking applications
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This #7 cobalt threaded-shank drill bit has a 0.2010-inch diameter and a 1/4"-28 thread size. It features a black oxide finish and meets NAS 965 Type D specifications. The overall length is 13/32". Threaded-shank drill bits are used in tool holders for precision drilling in metalworking applications
This #14 cobalt threaded-shank drill bit has a 0.1820-inch diameter and a 1/4"-28 thread size. The black oxide finish and cobalt construction provide heat resistance for drilling hard metals. It meets NAS 965 Type D specifications and is used in precision drilling applications where secure mounting in tool holders is required
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This #14 cobalt threaded-shank drill bit has a 0.1820-inch diameter and a 1/4"-28 thread size. The black oxide finish and cobalt construction provide heat resistance for drilling hard metals. It meets NAS 965 Type D specifications and is used in precision drilling applications where secure mounting in tool holders is required
Cobalt threaded-shank drill bit with a #21 diameter (0.1590") and 1/4"-28 thread shank. Black oxide finish. Overall length 9/16". Conforms to NAS 965 Type D. Used for precision drilling in hard metals where secure shank mounting is required
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