Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 228303BK20 found under Light Emitting Diod by Dresser Rand Co. The National Stock Number assigned to this part is 5980011390679, and the Federal Supply Class is 5980 Optoelectrical Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 228303BK20.