Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4000855 found under Seal Ring Metal by Funk Mfg Co. The National Stock Number assigned to this part is 5330004772470, 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 4000855.