Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X301 found under Seal Nonmetallic Special Shaped by Triple A Spring Limited Partnership. The National Stock Number assigned to this part is 5330002525878, 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 X301.