Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B-41D SYMBOL 2815.4 found under Light Indicator by J And H Smith Mfg Co Inc. The National Stock Number assigned to this part is 6210005388398, 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 B-41D SYMBOL 2815.4.