Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 416-7522 found under Restrictor Unit Flu by Aqua Chem Inc. The National Stock Number assigned to this part is 4730012423124, 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 416-7522.