Aircraft extension-length drill with straight shank, diameter 0.0430" (N57) with an overall length of 6" and flute length of 3/4" according to NAS907 Type B standard with 135° heavy duty split point, HSS with steam tempered finish for 4xD drilling without pecking in steel, stainless steel and cast iron
Applications:
P - Steel and cast steel(steels with alloy content ? 10% and a hardness of < 45HRC) - Primary use
M - Stainless steel(corrosion resistant steels with ? 11% chromium content) - Primary use
K - Cast Iron(castings of iron and carbon alloys with > 2% carbon content) - Primary use
N - Non-ferrous metals(metals including alloys without an appreciable amount of iron) - Primary use
S - High-temperature alloys(superalloys with high temperature stength and corrosion resistant surpassing that of stainless steel) - Primary use
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