5310-00-058-3152 (583152)
NSN 5310-00-058-3152 (NIIN 00-058-3152) is a lock washer in Federal Supply Class 5310, Nuts And Washers — a washer, usually round, with a centrally-located hole. Manufacturer part number 583152 (Ordnance Corps, CAGE 00000); also referenced as MILW6986TYPEA (Military Specifications).
NIIN assigned January 1963; DEMIL A (none required). Related NSN 5310-00-543-2739.