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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #28, 2-1/8" Overall Lg - High-Speed Steel Threaded-Shank Drill Bits
ROCKY MOUNTAIN TWISTHigh-Speed Steel Threaded-Shank Drill Bits

ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #28, 2-1/8" Overall Lg

The ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #28 is a high-speed steel threaded-shank drill bit with a 1/4"-28 thread size and a 0.1405-inch diameter. It features a 2-1/8" overall length, black oxide finish…

SKU 3G-OTH-192893

Brand
ROCKY MOUNTAIN TWIST
Item
Threaded Shank Drill Bit: #28, 2-1/8" Overall Lg
Category
High-Speed Steel Threaded-Shank Drill Bits
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Technical Specifications

ROCKY MOUNTAIN TWIST
Manufacturer Part Number
953HS28LS
Type
Black Oxide HSS
Overall Lg
2-1/8"
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ROCKY MOUNTAIN TWIST Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #28 is a high-speed steel threaded-shank drill bit with a 1/4"-28 thread size and a 0.1405-inch diameter. It features a 2-1/8" overall length, black oxide finish, and meets NAS 965 Type B specifications. This bit is designed for precision drilling applications requiring a threaded shank.

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 Threaded Shank Drill Bit #28 used for?

This drill bit is used for precision drilling in aerospace and industrial applications where a threaded shank is required for secure tool holding. It meets NAS 965 Type B specifications, making it suitable for high-tolerance hole-making in metal and composite materials.

What are the specifications of the ROCKY MOUNTAIN TWIST #28 drill bit?

The ROCKY MOUNTAIN TWIST #28 drill bit has a 0.1405-inch diameter, 1/4\"-28 thread size, and 2-1/8\" overall length. It is made from black oxide high-speed steel (HSS) and meets NAS 965 Type B standards. The manufacturer part number is 953HS28LS.

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, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this NAS 965 Type B bit.

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

Select a bit that matches your required hole diameter, thread size, and material. For aerospace applications, ensure the bit meets NAS 965 Type B specifications, as the ROCKY MOUNTAIN TWIST #28 does. Use a 1/4\"-28 threaded shank for secure retention in compatible tool holders.

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.

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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #28, 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS28SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1405; attr1235683: NAS 965 Type B.
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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #28, 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS28SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1405; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #28, 9/16" Overall Lg, Black Oxide HSS (MPN 953HS28ST). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1405; attr1235683: NAS 965 Type B.
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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #28, 9/16" Overall Lg, Black Oxide HSS (MPN 953HS28ST). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1405; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #27, 2-1/8" Overall Lg, Black Oxide HSS (MPN 953HS27LS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1440; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #27, 2-1/8" Overall Lg, Black Oxide HSS (MPN 953HS27LS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1440; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #26, 2-1/8" Overall Lg, Black Oxide HSS (MPN 953HS26LS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1470; attr1235683: NAS 965 Type B.
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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #26, 2-1/8" Overall Lg, Black Oxide HSS (MPN 953HS26LS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1470; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #22, 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS22SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1570; attr1235683: NAS 965 Type B.
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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #22, 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS22SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1570; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #27, 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS27SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1440; attr1235683: NAS 965 Type B.
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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #27, 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS27SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1440; attr1235683: NAS 965 Type B.

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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #25, 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS25SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1495; attr1235683: NAS 965 Type B.
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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #25, 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS25SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1495; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 7/64", 1/2" Overall Lg, Black Oxide HSS (MPN 953HS7/64ST). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1094; attr1235683: NAS 965 Type B.
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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 7/64", 1/2" Overall Lg, Black Oxide HSS (MPN 953HS7/64ST). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1094; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #3, 5/8" Overall Lg, Black Oxide HSS, NAS 965 Type B (MPN 953HS3ST). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.2130; attr1235683: NAS 965 Type B.
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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #36, 1" Overall Lg, Black Oxide HSS, NAS 965 Type B (MPN 953HS36SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1065; attr1235683: NAS 965 Type B.
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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #36, 1" Overall Lg, Black Oxide HSS, NAS 965 Type B (MPN 953HS36SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1065; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: Letter C, 9/16" Overall Lg, Black Oxide HSS (MPN 953HSCST). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.2420; attr1235683: NAS 965 Type B.
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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: Letter C, 9/16" Overall Lg, Black Oxide HSS (MPN 953HSCST). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.2420; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 13/64", 5/8" Overall Lg, Black Oxide HSS (MPN 953HS13/64ST). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.2031; attr1235683: NAS 965 Type B.
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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: 13/64", 5/8" Overall Lg, Black Oxide HSS (MPN 953HS13/64ST). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.2031; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #4, 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS4SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.2090; attr1235683: NAS 965 Type B.
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ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #4, 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS4SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.2090; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #30, 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS30SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1285; attr1235683: NAS 965 Type B.
ROCKY MOUNTAIN TWIST
ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #30, 1-1/4" Overall Lg, Black Oxide HSS (MPN 953HS30SS). Key specifications — attr1235676: ROCKY MOUNTAIN TWIST; attr1235682: 1/4"-28; attr1235677: 0.1285; attr1235683: NAS 965 Type B.