2a 1st end thread class flange forged 0.250 in. from thd pipe end, 1.375 in. od w/one side flatted, w/two no. 8-32 thd mtg holes npt 2nd end thread series
3a 1st end thread class 12 1st end thread quantity per inch machined groove in flared end to accommodate seal ring per KC103 passivate outside surface treated npt 2nd end thread series
3a 1st end thread class 12 1st end thread quantity per inch machined groove in flared end to accommodate seal ring per KC103 passivate outside surface treated npt 2nd end thread series