RMT NAS HSS Black Oxide Jobber Drill 118°NAS (National Aerospace Standard) HSS Jobber Length Drill Bits finished in oil treated black oxide. Designed and manufactured in the US by Rocky Mountain Twist Drill, black oxide HSS drill bits are a great general-purpose solution. The blacked drill bit is surface treated for corrosion resistance and increased lubricity. The drills flutes are precision ground for faster and more efficient swarf and chip removal. Spiral flutes are precisely ground to deliver superior cutting performance and accuracy. JH801 series blacked jobber drill bits are manufactured from Industrial-grade NAS High Speed Steel (HSS). Ideal for drilling Aluminum, Copper, Cast Iron and Steel (low and medium carbon). HSS Jobber Drill bits feature a 118° standard drill point.
SizesImperial diameters; including fractional drill sizes from 1/16” (.0625) to ½” (.5000), wire drill sizes from #1 (.2280) to #60 (.0400) and letter drill sizes from A (.2340) to Z (.4130).