5310-01-110-2453 (NUT)
NSN 5310-01-110-2453 (NIIN 01-110-2453) is a hexagon plain nut in Federal Supply Class 5310, Nuts And Washers — a nut, flat on top and bottom having 6 flat sides. Manufacturer part number NUT; also referenced as NUT 2H 5/8 IN. (Victor Products Corp).
Key specs: 24 to 38 rockwell c hardness; full characteristics table below. NIIN assigned March 1981; DEMIL A (none required).