Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P4902A NON-ASBESTOS found under Gasket by Atlas Valve Co. The National Stock Number assigned to this part is 5330013953620, 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 P4902A NON-ASBESTOS.