1 1 2 6 x 3 1 2 A307A Hex Bolt Plain Steel Short Arm Hex Keys Alloy Finished Hex Nuts in 316 Finished Hex Nuts in 316 stainless steel are for use with stainless steel bolts or screws with a specified minimum tensile strength equal or less than the specified proof stress of the mating nut 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 typically 1015 1022 Tensile strength will meet or exceed 60