| GENERAL CHARACTERISTICS ITEM DESCRIPTION | ALLOY STEEL; CADMIUM PLATED,QQ-P-416,TYPE 2,CLASS 3; HARDNESS RATING RC39-43; THD SERIES 0.250-28UNJF-3B; NUT H 0.320 IN. MAX; NUT DIA 0.420 IN.; COUNTERBORE DEPTH 0.112 IN.; COUNTERBORE DIA 0.286 IN.; SPECIAL WRENCH CONFIGURATION FOR NO. 10 SPLINE DRIVE; 8 SPLINES; DEFORMED THD LOCKING FEATURE |