Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U1-10E found under Adapter Straight Pi by Mueller Brass Co. The National Stock Number assigned to this part is 4730008394177, 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 U1-10E.