5/16X3/4 #14 H Unslotted Indented Hex Washer High Low Screw Fully Threaded Zinc (Pack Qty 1,250) BC-3112HW

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