5.280" hole diameter 5.480" outside diameter 0.012" material thickness qty of indents 12 min 18 max, o/a h attained under 50 lb PORM0.5 compression load
0.391" hole diameter 30 deg chamfer on top side around od, 45 deg by 0.062 in. chamfer on top side around id, four grooves 0.062 in. by 0.062 in. 90 deg apart on bottom