5310-00-194-7351 (FFW84CLASSBSTYLE2)
NSN 5310-00-194-7351 (NIIN 00-194-7351) is a lock washer in Federal Supply Class 5310, Nuts And Washers — a washer, usually round, with a centrally-located hole. Manufacturer part number FFW84CLASSBSTYLE2 (Federal Specifications Promulgated, CAGE 81348).
Key specs: 45 to 53 rockwell c hardness; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required). Supersedes 5340-00-914-8725 (1966); related NSN 5310-00-883-9385.