Part Number SL31CD-17 (PMA Stud 5 16 X 2 1 8 Long Drilled in stock with ready to ship. Get an instant quote for Superior Air Products Co part number SL31CD-17 (PMA by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for SL31CD-17 (PMA. Our dedicated account manager will get back to you within 15 minutes.