Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS51953-56B found under Nipple Pipe by Bae Systems Tactical Vehicle Systems Lp. The National Stock Number assigned to this part is 4730001881867, 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 MS51953-56B.