Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BF20 found under Fitting Kittube Pipe by Alaska Rubber And Supply. The National Stock Number assigned to this part is 4730016753708, 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 BF20.