Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B11-16 found under Bushing Pipe by American Society Of Mechanical. The National Stock Number assigned to this part is 4730005016720, 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 B11-16.