Part Number 68 1 8 IN. OD X 1 8 IN. MPT having (CAGE Code 80244) and FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings in stock with ready to ship. Get an instant quote for 68 1 8 IN. OD X 1 8 IN. MPT Adapter Straight Pipe To Tube by General Services Administration. Fill the form below with your desired order quantity, targeted price and the expected order-fulfilment date. Our dedicated account manager will get back to you within 15 minutes.