o ring material, nitrile base; eaa s, 6920-01-185-9279 amtc dystem (rets) radio control 6920-01-185-9278 amtc sys (rets) computer/cable CONTROL6920-01-250-0366 amtc, sys (rets) comp/cable ctr w/o bus heater 6920-01-233-8641 amtc, sys (rets) radio control w/o bus heater 6920-01-249-0270 amtc, radio ctrl, heater, 50 cycle cadmium surface treated unf all ends thread series