Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS51520A12S found under Nipple Tube by Bae Systems Tactical Vehicle Systems Lp. The National Stock Number assigned to this part is 4730012126821, 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 MS51520A12S.