CLEVELAND Aircraft Extension Drill: #21, 6" Overall Lg, 135° Split Point

The CLEVELAND Aircraft Extension Drill #21 is used for drilling precision holes in aerospace-grade materials. Its 6-inch overall length and 135° split point allow access to tight spaces, while the straw/bronze cobalt finish provides heat resistance for extended tool life in demanding aircraft maintenance and manufacturing applications.

The CLEVELAND C08138 is a #21 aircraft extension drill bit with a 0.1590-inch diameter, 6-inch overall length, and 135° split point. It features a straw/bronze cobalt finish and conforms to NAS 907 Type J specifications. This NAS-spec cobalt bit is designed for high-performance drilling in aerospace environments.

3G Electric supplies CLEVELAND aircraft extension drill bits like the C08138 to customers worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver genuine NAS-spec tooling to your facility. Contact us for pricing and lead time on this and other precision drilling products.

To select the right CLEVELAND aircraft extension drill bit, match the diameter (e.g., 0.1590-inch for #21) and overall length (6 inches) to your hole depth and access requirements. The 135° split point reduces walking on curved surfaces, and the straw/bronze cobalt finish suits high-heat aerospace alloys. Always verify NAS 907 Type J compliance for critical applications.