- Hi-line's Aviation Type B adapter drills are made from cobalt high speed steel and are manufactured to NAS 965 Type B specifications with 135 deg heavy duty split points and surface treated for drilling hard, tough high tensile strength materials
- When drilling low tensile strength materials, the Type B cobalt drill will have a significantly greater tool life than the NAS 954 Type B high speed steel adapter drill, resulting in a much lower cost per drill
| Type | Drill Bit |
| Style | Threaded NAS / COBALT (Stubby) |
| Size | 5/16" |
| Material | Cobalt High Speed Steel |
| Length | 5/8" |
| Drill Style | Fractional Inch |
| Shank Size | 1/4"-28 |
| Point Type | 135° Split Point |
| Finish | Black Oxide |
| Specifications | NAS 965 Type “D” |
| Application | For use in Stainless Steel, Titanium and Inconel |
| Cutting Direction | Right Handed |
