Part Number 142-58646 having (CAGE Code 28298) and FSC 5360 Coil, Flat, Leaf, and Wire Springs in stock with ready to ship. Get an instant quote for 142-58646 Spring Helical Extension by Smith And Smith Aircraft Co. 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.