10-16X1/2 #8HD Unslotted Indented Hex Washer High Low Screw Fully Threaded Black Oxide (Pack Qty 8,000) BC-1008HWB

For use in plastic, nylon, wood or other low-density materials. Thread design reduces driving torques, enhances resistance to thread stripping, improves pullout strength and lessens risk of cracking the work piece Steel: 1019-1022 or equivalent steel. Stainless: 410 martensitic or 18-8 austenitic stainless steel Steel: Rockwell C45 minimum