M4-0.7X12 ISO 7045 Phil Pan 304SS Split Washer Sems Machine Screw Full Thread A2 Stainless (Pack Qty 2,000) BC-MI412SPPA2

The washer/screw assembly makes this a locking screw with the washer providing the locking action. Machine pre-assembly provides cost savings to the end user. The split lockwasher variety is preferred for use with hardened bearing surfaces Screw: C1008 or equivalent carbon steel. Washer: Spring Steel Stainless: Screw: Class 304 SS. Washer: Class 304 SS