Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS51523A6S found under Tee Tube by Eaton Aeroquip Inc. The National Stock Number assigned to this part is 4730000613047, 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 MS51523A6S.