Longworth - Leading Supplier of Precision Quality Air-Fittings. Longworth is a family owned, Australian engineering company founded by John Longworth in 1950. We specialised in manufacturing of truck and industrial air fittings. We have a rich experience of over 70 years in manufacturing quality precision components. Located at Moorabbin, Victoria we have been an essential supplier of machine components. We cater to various industries including the Automotive industry.