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Drill Bits NAS 907 High Speed Steel Drill Bits NAS907 Letter Sizes R42C - HSS, Heavy Duty, NAS 907, Type C, Surface Treated, 135° Split Point Manufactured to National Aerospace Standard 907. 135° split point is self centering and reduces thrust. Ideal for portable or machine drilling. Short, rugged construction performs well in a broad range of materials in the iron and steel families.   Letter Diameter Decimal Equivalent Flute Length, Inch Overall Length, Inch Pkg Qty Price Pkg. R42C EDP # Purchase Online A 0.234 1.9375 2.4375 12 $5.30 44242801 Buy Now B 0.238 1.3750 2.5000 12 $5.30 44242802 Buy Now C 0.242 1.3750 2.5000 12 $5.30 44242803 Buy Now D 0.246 1.3750 2.5000 12 $5.30 44242804 Buy Now E 0.250 1.3750 2.5000 12 $5.64 44242805 Buy Now F 0.257 1.4375 2.6250 12 $5.82 44242806 Buy Now G 0.261 1.4375 2.6250 12 $6.22 44242807 Buy Now H 0.266 1.5000 2.6875 12 $6.22 44242808 Buy Now I 0.272 1.5000 2.6875 12 $6.22 44242809 Buy Now J 0.277 1.5000 2.6875 12 $6.66 44242810 Buy Now K 0.281 1.5000 2.6875 12 $7.18 44242811 Buy Now L 0.290 1.5625 2.7500 12 $7.18 44242812 Buy Now M 0.295 1.5625 2.7500 12 $7.82 44242813 Buy Now N 0.302 1.6250 2.8125 12 $7.82 44242814 Buy Now O 0.316 1.6875 2.9375 6 $7.90 44242815 Buy Now P 0.323 1.6875 2.9375 6 $8.84 44242816 Buy Now Q 0.332 1.6875 3.0000 6 $8.84 44242817 Buy Now R 0.339 1.6875 3.0000 6 $8.94 44242818 Buy Now S 0.348 1.7500 3.0625 6 $10.16 44242819 Buy Now T 0.358 1.7500 3.0625 6 $11.80 44242820 Buy Now U 0.368 1.8125 3.1250 6 $11.80 44242821 Buy Now V 0.377 1.8750 3.2500 6 $12.58 44242822 Buy Now W 0.386 1.8750 3.2500 6 $13.24 44242823 Buy Now X 0.397 1.9375 3.3125 6 $15.34 44242824 Buy Now Y 0.404 1.9375 3.3125 6 $18.16 44242825 Buy Now Z 0.413 2.0000 3.3750 6 $18.16 44242826 Buy Now