Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS51504A8-12 found under Elbow Pipe To Tube by L And L Mfg Co. The National Stock Number assigned to this part is 4730006188126, 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 MS51504A8-12.