Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HE712-6 found under Valve Check by Grimes Aerospace Company. The National Stock Number assigned to this part is 4820002025939, 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 HE712-6.