steel,17-4ph,armco steel co; outside dia 3.66 in.;inside dia 2.00 in.;length 0.698 in.; heat treat to rc36-rc40 cond h1075; flange has 10 holes tapped 0.250-28 thd counter bored far side 0.312 in. dia by 0.442 in. deep; 125 micro inch finish overall general characteristics item description