CLEVELAND Aircraft Extension Drill: #21, 12" Overall Lg, 135° Split Point
The CLEVELAND Aircraft Extension Drill: #21 is an NAS-Spec Cobalt Aircraft-Extension Drill Bit, model NAS 907 Type J. It features a 0.1590-inch diameter, 12-inch overall length, and a 135° split point with a…
SKU 3G-OTH-198870
Need installation or engineering help?
Ask a question
Product Description
The CLEVELAND Aircraft Extension Drill: #21 is an NAS-Spec Cobalt Aircraft-Extension Drill Bit, model NAS 907 Type J. It features a 0.1590-inch diameter, 12-inch overall length, and a 135° split point with a straw/bronze cobalt finish (MPN C08175).
Frequently Asked Questions
What is the CLEVELAND Aircraft Extension Drill #21 used for?
The CLEVELAND Aircraft Extension Drill #21 is used for precision drilling in aerospace and industrial applications where deep, tight-tolerance holes are required. Its 12-inch overall length and 135° split point allow efficient cutting in hard materials, while the straw/bronze cobalt finish provides heat resistance and durability.
What are the specifications of the CLEVELAND C08175 drill bit?
The CLEVELAND C08175 is an NAS 907 Type J aircraft-extension drill bit with a 0.1590-inch diameter, 12-inch overall length, and 135° split point. It features a straw/bronze cobalt finish for enhanced wear resistance. This bit is designed for demanding aerospace drilling tasks.
Where to buy CLEVELAND aircraft extension drill bits worldwide?
3G Electric supplies CLEVELAND aircraft extension drill bits worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source genuine NAS-spec tooling like the C08175 and deliver to your facility. Contact us for pricing and lead time on this item.
How to select the right aircraft extension drill bit for aerospace work?
Select an aircraft extension drill bit based on hole diameter, material hardness, and reach requirements. For deep holes in tough alloys, choose a cobalt bit with a 135° split point like the CLEVELAND #21. Ensure the bit meets NAS specs (e.g., NAS 907 Type J) for aerospace compliance.
Used in
Common applications for CLEVELANDCLEVELAND Products
3G Electric supplies CLEVELAND nas-spec cobalt aircraft-extension drill bits. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















