Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B5018 found under Valve Seat by Rowan Bmi Corp. The National Stock Number assigned to this part is 2910003544950, and the Federal Supply Class is 2910 Engine Fuel System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B5018.