3/8 SAE FLAT WASHER BLACK OXIDE
3/8 SAE FLAT WASHER PLAIN
3/8 SAE FLAT WASHER ZINC (Cr3)
3/8 SAE FLAT WASHER GR 8 Z&Y ID .401-.421 OD.805-.827 THK .051-.080 THRU-HARDENED HRC 38-45 MFG ID STAMPING REQUIRED PER ASTM F436