"SURFACE CADMIUM PLATED PER QQ-P-416,3 RADIATING ARMS 2.499IN. OD,1.563IN. ID FOR 3.990IN. THEN 1.603IN. MAX,4.852IN. L,15SPLINES ON ID OF HUB 0.377IN. APART,11.542IN. O/A L,CONE SEAT SURFACES NOT PLATED,SPIDER MUST BALANCE IN ALL POSITIONS ABOUT CONE SEAT AXIS"