Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FR4480YELL0W found under Filter Indicator Light by Kopp Glass Inc. The National Stock Number assigned to this part is 6210007364596, and the Federal Supply Class is 6210 Indoor And Outdoor Electrical Lighting Fixtures. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like FR4480YELL0W.