Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ZZC13BGS40 found under Valve Expansion by Tenney Engineering Inc. The National Stock Number assigned to this part is 4820009387364, 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 ZZC13BGS40.