Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5HA520 found under Valve Pneumatic Tank by Oshkosh Corporation. The National Stock Number assigned to this part is 4820014754873, 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 5HA520.