Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

ROCKY MOUNTAIN TWIST #31 High-Speed Steel Threaded-Shank Drill Bit - High-Speed Steel Threaded-Shank Drill Bits
ROCKY MOUNTAIN TWISTHigh-Speed Steel Threaded-Shank Drill Bits

ROCKY MOUNTAIN TWIST #31 High-Speed Steel Threaded-Shank Drill Bit

The ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #31 is a high-speed steel threaded-shank drill bit with a 0.1200-inch diameter and a 1/4"-28 thread size. It features a black oxide finish and conforms to NAS 965…

SKU 3G-OTH-192804

Brand
ROCKY MOUNTAIN TWIST
Item
#31 High-Speed Steel Threaded-Shank Drill Bit
Category
High-Speed Steel Threaded-Shank Drill Bits
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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
953HS31ST
Type
Black Oxide HSS, NAS 965 Type B
Overall Lg
1/2"

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #31 is a high-speed steel threaded-shank drill bit with a 0.1200-inch diameter and a 1/4"-28 thread size. It features a black oxide finish and conforms to NAS 965 Type B, with a 1/2" overall length (MPN 953HS31ST).

Frequently Asked Questions

What is the ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit #31 used for?

This drill bit is used for precision drilling in aerospace and industrial applications where a threaded shank is required for secure mounting in tool holders. It conforms to NAS 965 Type B, making it suitable for high-tolerance tasks on materials like steel and alloys.

What are the specifications of the ROCKY MOUNTAIN TWIST 953HS31ST drill bit?

The ROCKY MOUNTAIN TWIST 953HS31ST is a #31 drill bit with a 0.1200-inch diameter, 1/4"-28 threaded shank, and 1/2-inch overall length. It is made of high-speed steel with a black oxide finish and meets NAS 965 Type B standards.

Where to buy ROCKY MOUNTAIN TWIST drill bits worldwide?

3G Electric supplies ROCKY MOUNTAIN TWIST drill bits worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us to source the 953HS31ST or other threaded shank drill bits for your operations.

How to select the correct ROCKY MOUNTAIN TWIST threaded shank drill bit?

Select based on thread size (e.g., 1/4"-28), diameter (e.g., 0.1200 inch for #31), and overall length (e.g., 1/2 inch). Ensure the bit conforms to NAS 965 Type B for aerospace-grade precision. ROCKY MOUNTAIN TWIST bits are high-speed steel with black oxide for durability.

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

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
This high-speed steel drill bit features a #31 (0.1200-inch) diameter and a 1/4"-28 threaded shank for secure retention in jigs and fixtures. The black oxide finish provides resistance against wear and corrosion. With a 1-inch overall length, it conforms to NAS 965 Type B standards, suitable for precision drilling in assembly operations requiring accurate hole sizing
ROCKY MOUNTAIN TWIST
This high-speed steel drill bit features a #31 (0.1200-inch) diameter and a 1/4"-28 threaded shank for secure retention in jigs and fixtures. The black oxide finish provides resistance against wear and corrosion. With a 1-inch overall length, it conforms to NAS 965 Type B standards, suitable for precision drilling in assembly operations requiring accurate hole sizing
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #31, 2-1/8" Overall Lg, Black Oxide HSS (MPN 953HS31LS)
ROCKY MOUNTAIN TWIST
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #31, 2-1/8" Overall Lg, Black Oxide HSS (MPN 953HS31LS)
High-speed steel drill bit with a threaded shank for secure mounting in tool holders. Features a black oxide finish and conforms to NAS 965 Type B standards. Suitable for precision drilling in metals where a threaded shank is required
ROCKY MOUNTAIN TWIST
High-speed steel drill bit with a threaded shank for secure mounting in tool holders. Features a black oxide finish and conforms to NAS 965 Type B standards. Suitable for precision drilling in metals where a threaded shank is required
High-speed steel threaded-shank drill bit with a 0.1040-inch diameter and 1/4"-28 thread. Black oxide finish reduces friction. Conforms to NAS 965 Type B. Overall length 1 inch. Used in jigs, fixtures, and assembly operations requiring threaded shank retention
ROCKY MOUNTAIN TWIST
High-speed steel threaded-shank drill bit with a 0.1040-inch diameter and 1/4"-28 thread. Black oxide finish reduces friction. Conforms to NAS 965 Type B. Overall length 1 inch. Used in jigs, fixtures, and assembly operations requiring threaded shank retention
This high-speed steel drill bit features a #1 wire gauge diameter of 0.2280 inches and a 1/4"-28 threaded shank for secure mounting in tool holders. The black oxide finish provides resistance to wear and corrosion. With an overall length of 1-1/4 inches, it is suitable for precision hole-making in metal fabrication and maintenance tasks where a threaded shank is required
ROCKY MOUNTAIN TWIST
This high-speed steel drill bit features a #1 wire gauge diameter of 0.2280 inches and a 1/4"-28 threaded shank for secure mounting in tool holders. The black oxide finish provides resistance to wear and corrosion. With an overall length of 1-1/4 inches, it is suitable for precision hole-making in metal fabrication and maintenance tasks where a threaded shank is required
This high-speed steel drill bit features a #34 diameter (0.1110 inch) and a 1/4-28 threaded shank for secure retention in tool holders. The black oxide finish provides resistance to wear and corrosion. With a 1-inch overall length and compliance to NAS 965 Type B, it is suited for precision drilling in metals where threaded shank retention is required
ROCKY MOUNTAIN TWIST
This high-speed steel drill bit features a #34 diameter (0.1110 inch) and a 1/4-28 threaded shank for secure retention in tool holders. The black oxide finish provides resistance to wear and corrosion. With a 1-inch overall length and compliance to NAS 965 Type B, it is suited for precision drilling in metals where threaded shank retention is required

More from ROCKY MOUNTAIN TWIST

View all ROCKY MOUNTAIN TWIST parts
This high-speed steel drill bit features a threaded shank for secure retention in tool holders. The black oxide finish reduces friction and provides wear resistance. With a Letter A diameter of 0.2340 inches and a 1/4"-28 thread, it is suited for precision drilling in metals such as steel and aluminum. Overall length is 2-1/8"
ROCKY MOUNTAIN TWIST
This high-speed steel drill bit features a threaded shank for secure retention in tool holders. The black oxide finish reduces friction and provides wear resistance. With a Letter A diameter of 0.2340 inches and a 1/4"-28 thread, it is suited for precision drilling in metals such as steel and aluminum. Overall length is 2-1/8"
This high-speed steel drill bit features a #32 diameter (0.1160 inch) and a 1/4-28 threaded shank for secure retention in collets or holders. The black oxide finish reduces friction and improves chip flow. Conforms to NAS 965 Type B specifications. Overall length is 1/2 inch. Suitable for precision drilling in metal assemblies where threaded shank retention is required
ROCKY MOUNTAIN TWIST
This high-speed steel drill bit features a #32 diameter (0.1160 inch) and a 1/4-28 threaded shank for secure retention in collets or holders. The black oxide finish reduces friction and improves chip flow. Conforms to NAS 965 Type B specifications. Overall length is 1/2 inch. Suitable for precision drilling in metal assemblies where threaded shank retention is required
This high-speed steel threaded-shank drill bit features a black oxide finish and a 0.2460-inch diameter (Letter D). It has a 1/4"-28 thread size and a 9/16" overall length. The bit meets NAS 965 Type B specifications. Typical applications include precision drilling in metalworking where threaded shank retention is required
ROCKY MOUNTAIN TWIST
This high-speed steel threaded-shank drill bit features a black oxide finish and a 0.2460-inch diameter (Letter D). It has a 1/4"-28 thread size and a 9/16" overall length. The bit meets NAS 965 Type B specifications. Typical applications include precision drilling in metalworking where threaded shank retention is required
This high-speed steel drill bit features a threaded shank for secure tool retention in precision drilling applications. With a 9/32" diameter and 1/4"-28 thread, it is suitable for metalworking tasks requiring reliable hole placement. The black oxide finish provides resistance to wear and corrosion. Overall length is 2-1/8"
ROCKY MOUNTAIN TWIST
This high-speed steel drill bit features a threaded shank for secure tool retention in precision drilling applications. With a 9/32" diameter and 1/4"-28 thread, it is suitable for metalworking tasks requiring reliable hole placement. The black oxide finish provides resistance to wear and corrosion. Overall length is 2-1/8"
This 5/16" diameter drill bit features a 1/4"-28 threaded shank for secure mounting in tool holders. Made from black oxide high-speed steel (HSS) with a 5/8" overall length, it meets NAS 965 Type B specifications. Suitable for precision drilling in metalworking applications requiring a threaded shank
ROCKY MOUNTAIN TWIST
This 5/16" diameter drill bit features a 1/4"-28 threaded shank for secure mounting in tool holders. Made from black oxide high-speed steel (HSS) with a 5/8" overall length, it meets NAS 965 Type B specifications. Suitable for precision drilling in metalworking applications requiring a threaded shank
This threaded-shank drill bit is made from high-speed steel with a black oxide finish. It has a #40 diameter (0.0980 inches) and a 1/4"-28 thread size, with an overall length of 1/2". Conforms to NAS 965 Type B standards. Used for precision drilling in applications requiring threaded shank retention, such as aerospace and industrial metalworking
ROCKY MOUNTAIN TWIST
This threaded-shank drill bit is made from high-speed steel with a black oxide finish. It has a #40 diameter (0.0980 inches) and a 1/4"-28 thread size, with an overall length of 1/2". Conforms to NAS 965 Type B standards. Used for precision drilling in applications requiring threaded shank retention, such as aerospace and industrial metalworking
High-speed steel drill bit with a #29 diameter (0.1360") and 1/4"-28 threaded shank for secure retention in tool holders. Black oxide finish reduces friction and improves wear resistance. Overall length 2-1/8". Suitable for precision drilling in metalworking applications requiring a threaded shank
ROCKY MOUNTAIN TWIST
High-speed steel drill bit with a #29 diameter (0.1360") and 1/4"-28 threaded shank for secure retention in tool holders. Black oxide finish reduces friction and improves wear resistance. Overall length 2-1/8". Suitable for precision drilling in metalworking applications requiring a threaded shank
This high-speed steel drill bit features a threaded shank for secure tool holding in precision drilling applications. It has a 0.1590-inch diameter, 1/4"-28 thread size, and 13/32" overall length. The black oxide finish provides resistance to wear and corrosion. Conforms to NAS 965 Type B
ROCKY MOUNTAIN TWIST
This high-speed steel drill bit features a threaded shank for secure tool holding in precision drilling applications. It has a 0.1590-inch diameter, 1/4"-28 thread size, and 13/32" overall length. The black oxide finish provides resistance to wear and corrosion. Conforms to NAS 965 Type B