Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B801-2 found under Valve Float by Master Pneumatic Detroit Inc. The National Stock Number assigned to this part is 4820000343397, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B801-2.