stressproof material,5/8 in. lg 0.7510 to 0.7515 in. od general characteristics item description, 1/2 in. id one end 0.0625 in. deep general characteristics item description, 0.6245 to 0.6255 in. id 2nd end w/1/32 in. max reamer chamfer at junction of ids general characteristics item description