Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 123B10484-21 found under Gasket Window by Central Gasket And Supply Co Inc. The National Stock Number assigned to this part is 5330000662905, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 123B10484-21.