Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 301257 ASSY 640030-01 found under Valve Actuator by Tri Tec Manufacturing Llc. The National Stock Number assigned to this part is 4810016198987, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 301257 ASSY 640030-01.