Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M8B20J found under Packing Preformed by Wilden Pump And Engineering Co. The National Stock Number assigned to this part is 5330004922694, 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 M8B20J.