Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12S50XSS found under Tee Tube by Parker Hannifin Corporation. The National Stock Number assigned to this part is 4730013286828, 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 12S50XSS.