5310-01-600-1312 (11103714)
NSN 5310-01-600-1312 (NIIN 01-600-1312) 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 11103714 (Fastenal Company, CAGE 3CN65).
Key specs: 91.5 rockwell b nominal hardness; full characteristics table below. NIIN assigned November 2011; DEMIL A (none required); ESD/EMI-sensitive.