Standard Pack = 1 piece(s). Ball Diameter = 0.5 IN; Center of Ball to End = 0.88 IN; Center of Ball to Under Shoulder = 0.5 IN; Shank Diameter = 0.2497 IN; Shoulder Diameter = 0.5 IN; Thread = 6-32 IN; Type = Short Shank Inpection Tooling Ball;