Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2BA55 found under Retainer Disk Valve by Oshkosh Corporation. The National Stock Number assigned to this part is 4820011553587, 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 2BA55.