Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4400B0507-12 found under Elbow Pipe To Hose by Bae Systems Information And Electronic Systems Integration Inc. The National Stock Number assigned to this part is 4730007873726, 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 4400B0507-12.