Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 43N3-134 found under Valve Regulating System Pressure by Ellis And Watts International Llc. The National Stock Number assigned to this part is 4820011860595, 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 43N3-134.