part stock: 124374
Thread/Screw/Hole Size: M4, Diameter - Inside: 0.189" (4.80mm), Diameter - Outside: 0.563" (14.30mm) 9/16", Diameter - Shoulder: 0.374" (9.50mm), Thickness - Overall: 0.500" (12.70mm) 1/2", Length - Below Head: 0.438" (11.13mm) 7/16",