Part Number 18991 having (CAGE Code 02860) and FSC 5360 Coil, Flat, Leaf, and Wire Springs in stock with ready to ship. Get an instant quote for 18991 Spring Helical Compression by American Seating Company. 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.