Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ER-783D121012 found under Tee Tube To Boss by Eaton Corporation. The National Stock Number assigned to this part is 4730011443742, 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 ER-783D121012.