Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number VNB31LHK ITEM 9 found under Seal Plain by Mastergear Corp. The National Stock Number assigned to this part is 5330016563963, 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 VNB31LHK ITEM 9.