Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 389 7273 found under Parts Kit Valve by Tescom Corporation. The National Stock Number assigned to this part is 4820016013608, 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 389 7273.