Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 50550 found under Sleeve Mounting by Acal Electronics Ltd. The National Stock Number assigned to this part is 6210011149118, and the Federal Supply Class is 6210 Indoor And Outdoor Electrical Lighting Fixtures. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 50550.