Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 56D22993-1 found under Gasket by San Antonio Air Logistics Center. The National Stock Number assigned to this part is 5330006710858, 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 56D22993-1.