Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SD000109 found under Valve Exhaust Control by Tug Technologies Corporation. The National Stock Number assigned to this part is 4820016629226, 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 SD000109.