NAS907B (National Aerospace Standard)
M7 high speed steel
Right hand cutting direction, standard spiral
135° split point, self-centring eliminates walking
Black oxide finish ; Application ; Portable or machine drilling in hard steels, stainless steel and other hard materials.
| Material | High Speed Steel |
| Drill Size | B |
| Decimal Drill Size | 0.238" |
| Overall Length | 6" |
| Flute Length | 2-3/4" |
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| Drill type | Letter Gauge Sizes |
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