5310-01-679-1553 (AEW07X438000EA1AT1)
NSN 5310-01-679-1553 (NIIN 01-679-1553) is a lock washer in Federal Supply Class 5310, Nuts And Washers — a washer, usually round, with a centrally-located hole. Manufacturer part number AEW07X438000EA1AT1 (The American Society Of Mechanical, CAGE 05047); also referenced as B18.24 (The American Society Of Mechanical).
NIIN assigned March 2019; DEMIL A (none required); ESD/EMI-sensitive; unit of issue EA (each), $0.76 gov standard price.