Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SS399-A-17 found under Stud Turnlock Fastener by Ellis And Watts International Llc. The National Stock Number assigned to this part is 5325007039354, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SS399-A-17.