Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 50154 found under Valve Regulating Te by Trac Regulators Inc. The National Stock Number assigned to this part is 4820012516210, 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 50154.