M20 2.5 x 210 Hex Cap Screw 8.8 DIN 931 Zinc Plated HeadLOK Heavy Duty Flathead Fasteners 3 1 2 8 A194 2H Heavy 3 1 2 8 A194 2H Heavy Hex Nut Plain Straight shank to 1 2” 1 2” reduced shank for sizes above 1 2” M2 high speed steel Sharp cutting edge to drill in many different materials: Mild Steel Cast Iron Aluminum Wood Extra length flute with continuous cutting edges for drilling deep holes and fast chip removal Reduced shank fits all drill motors with 1 2” chucks Non slip grip prevents the bit from spinning in the chuck medium strength fasteners with partially threaded shanks conforming to DIN 931 8 Hex Cap Screws are manufactured from medium carbon steel