Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AP21-273 found under Rubber Strip by Hardigg Industries Inc. The National Stock Number assigned to this part is 5330012268838, 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 AP21-273.