12-14X6 Unslotted Indented Hex washer Self Drill Screw Full Thread Zinc (Pack Qty 400) BC-1296KW

Designed to be inserted into a like-sized, hollow recess of a socket screw to manually tighten or loosen the fastener Alloy steel containing at least two of the following elements: chromium, nickel, molybdenum or vanadium, in sufficient quantity to assure that the minimum surface hardness meets the standards listed below