Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TC78V14-25-35 found under Valve Pressure Equalizing Gaseou by Ta Instrument Case Co. The National Stock Number assigned to this part is 4820011891661, 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 TC78V14-25-35.