5310-00-892-4730 (200-157)
NSN 5310-00-892-4730 (NIIN 00-892-4730) is a flat washer in Federal Supply Class 5310, Nuts And Washers — a washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. Manufacturer part number 200-157 (M. E. Industries, Inc., CAGE 0BUN9); also referenced as 203-15-9-2, 25M73, 2SM73 (Kaydon Custom Filtration Corporation); C1019 PIECE 97 (M. E. Industries, Inc.).
Key specs: 80 durometer nominal hardness; full characteristics table below. NIIN assigned January 1962; DEMIL A (none required); unit of issue EA (each), $18.48 gov standard price; export Schedule B 4016.93.0000; ships at 0.02 lb / 0.0004 cu ft.