ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #21, 9/16" Overall Lg
The ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #21 is a cobalt threaded-shank drill bit with a 0.1590-inch diameter and a 1/4"-28 thread size. It features a black oxide finish and conforms to NAS 965 Type D…
SKU 3G-OTH-195581
Need installation or engineering help?
Ask a question
Product Description
The ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #21 is a cobalt threaded-shank drill bit with a 0.1590-inch diameter and a 1/4"-28 thread size. It features a black oxide finish and conforms to NAS 965 Type D specification, with an overall length of 9/16 inch.
Frequently Asked Questions
What is the ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit #21 used for?
This cobalt threaded-shank drill bit is designed for precision drilling in aerospace and industrial applications requiring NAS 965 Type D compliance. Its 1/4"-28 threaded shank allows secure mounting in tool holders, while the black oxide cobalt construction provides heat resistance and durability for hard metals.
What are the specifications of the ROCKY MOUNTAIN TWIST #21 drill bit?
The ROCKY MOUNTAIN TWIST #21 drill bit has a 0.1590-inch diameter, 9/16-inch overall length, and a 1/4"-28 threaded shank. It is made of black oxide cobalt and conforms to NAS 965 Type D specification. The manufacturer part number is 953CO21ST.
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 equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the #21 bit (MPN 953CO21ST).
How to select the correct ROCKY MOUNTAIN TWIST threaded shank drill bit?
Select based on required diameter, thread size, and material. The #21 bit has a 0.1590-inch diameter with a 1/4"-28 thread, suitable for NAS 965 Type D applications. For hard metals, choose black oxide cobalt. Ensure the threaded shank matches your tool holder's thread specification.
Used in
Common applications for ROCKY MOUNTAIN TWISTROCKY 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.
