5310-00-145-1807 (710001-9)
NSN 5310-00-145-1807 (NIIN 00-145-1807) 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 710001-9 (Hamilton Sundstrand Corporation, CAGE 73030).
Key specs: 45 to 50 rockwell c hardness; full characteristics table below. NIIN assigned May 1969; DEMIL A (none required); ESD/EMI-sensitive; unit of issue EA (each), $49.23 gov standard price.