5310-00-596-9444 (FFW84CLASSASTYLE2)
NSN 5310-00-596-9444 (NIIN 00-596-9444) is a lock washer in Federal Supply Class 5310, Nuts And Washers — a washer, usually round, with a centrally-located hole. Manufacturer part number FFW84CLASSASTYLE2 (Federal Specifications Promulgated, CAGE 81348); also referenced as MS35338-36 (Military Standards).
Key specs: 45 to 53 rockwell c hardness; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required). Supersedes 5310-00-802-7396 (1962); related NSN 5310-00-060-9435.