Matl steel per ams 6272; hardness per rockwell c20 min and c40 max; 0.49 in. Min and 0.51 in. Max long; body 0.7205 in. Min and 0.7215 in. Max od; flange 0.806 in. Min and 0.810 in. Max od chamfered to 0.69 in. Min and 0.71 in. Max diameter at 43 min and 45 max dia