Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MA1-21018 found under Swivel Joint Tube by Am General Llc. The National Stock Number assigned to this part is 4730012685322, 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 MA1-21018.