Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D-450 2IN AND LR145189 found under Valve Plug by R And M Energy Systems Tomball P. The National Stock Number assigned to this part is 4820012726670, 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 D-450 2IN AND LR145189.