5310-01-564-6071 (0401770020)
NSN 5310-01-564-6071 (NIIN 01-564-6071) is a lock washer in Federal Supply Class 5310, Nuts And Washers — a washer, usually round, with a centrally-located hole. Manufacturer part number 0401770020 (Wurth Australia Pty Ltd - North, CAGE Z4D14); also referenced as 12422608-025 (U S Army Tank Automotive Command); 21542031-192 (Bae Systems Hagglunds Aktiebolag); NL20 (Nord Lock Inc).
Key specs: 72 to 77 rockwell a hardness; full characteristics table below. NIIN assigned June 2008; DEMIL A (none required); ESD/EMI-sensitive; unit of issue EA (each), $2.47 gov standard price; export Schedule B 8710.00.0090; ships at 0.02 lb / 0.0001 cu ft. Supersedes 5310-01-570-5961 (2013).