Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 645 STEM WITH 7250 CORE found under Valve Pneumatic Tank by Scovill Inc. The National Stock Number assigned to this part is 4820001035670, 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 645 STEM WITH 7250 CORE.