Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5HB314 found under Valve Check by Dunham Bush Ltd. The National Stock Number assigned to this part is 4820002670339, 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 5HB314.