Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RT502-16 found under by Crosby Group Inc. The National Stock Number assigned to this part is 3810003523596, and the Federal Supply Class is 3810 Cranes And Crane Shovels. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RT502-16.