5/16-9X1 1/4 Indented Hex Head Unslotted Self Tapping Screw Type A Fully Threaded Zinc (Pack Qty 1,000) BC-3120AH

Screws shall be quenched in liquid and then tempered by reheating to 650°F minimum. They are the screw thread covering the whole length of the screw from tip to head and a pronounced thread hard enough for the intended. Steel: Rockwell C45 minimumYou may also like 7/16-14X1 1/4 Coarse Thread Socket Set Screw Cup Plain (Pack Qty 50) BC-4320SSC.