Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GH-18 found under Seal Plain Encased by Cogswell Mfg Co Inc. The National Stock Number assigned to this part is 5330011098087, 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 GH-18.