Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 50311 found under Fitting Stop by Parker Hannifin Ltd. The National Stock Number assigned to this part is 4730008691631, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 50311.