Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 300185 REV M found under Valve Butterfly by Tri Tec Manufacturing Llc. The National Stock Number assigned to this part is 4820016503216, 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 300185 REV M.