Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A3811 found under Seal Ringmetal by Sealing Corporation. The National Stock Number assigned to this part is 5330016851408, 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 A3811.