Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A18-16 found under Retainer Packing by Ortman Fluid Power Quincy Compre. The National Stock Number assigned to this part is 5330011778349, 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 A18-16.