Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1517 found under Swing Joint Tube by Rgi Inc. The National Stock Number assigned to this part is 4730004757590, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1517.