5310-01-286-6071 (10459663)
NSN 5310-01-286-6071 (NIIN 01-286-6071) is a key washer in Federal Supply Class 5310, Nuts And Washers — a washer of nonresilient material usually having two parallel bearing surfaces. Manufacturer part number 10459663 (Nimikkeistokeskus Ncb Finland, CAGE A486G); also referenced as MS9581-13 (Military Standards).
NIIN assigned October 1988; DEMIL A (none required).