Rocky Mountain Twist 3G-OTH-192913 — Technical Specifications

The ROCKY MOUNTAIN TWIST Threaded Shank Drill Bit: #20 is a high-speed steel threaded-shank drill bit with a 0.1610-inch diameter and a 1/4"-28 thread size. It features a black oxide finish and meets NAS 965 Type B specifications, with an overall length of 2-1/8 inches (MPN 953HS20LS).