Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ND3955ITEM6 found under Flexible Element by Oil States Industries Inc. The National Stock Number assigned to this part is 4820013752138, 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 ND3955ITEM6.