5310-01-482-9231 (98019A160)
NSN 5310-01-482-9231 (NIIN 01-482-9231) 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 98019A160 (Mcmaster-Carr Supply Co, CAGE 39428).
Key specs: 270 rockwell b nominal hardness; full characteristics table below. NIIN assigned March 2001; DEMIL A (none required).