Matl steel per qq-s-633; 0.595 in. Min and 0.605 in. Max long; body 1.56 in. Min and 1.58 in. Max od; flange 2.74 in. Min and 2.76 in. Max od; bore 1.2435 in. Min and 1.2455 in. Max dia; counterbore 2.0680 in. Min and 2.0695 in. Max diameter by 0.228 in. Min and 0.238 in. Max deep