Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S1237389 found under Plug Elastic by Boeing Aircraft. The National Stock Number assigned to this part is 4730000419775, 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 S1237389.