Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ND 2697 found under Valve Check by Pearson Engineering Ltd. The National Stock Number assigned to this part is 4820012358519, 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 ND 2697.