Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RB9477 found under Housing Check Valve by Crane Company. The National Stock Number assigned to this part is 1650005094778, and the Federal Supply Class is 1650 Aircraft Hydraulic Vacuum And De-Icing System Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RB9477.