Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RV-40 PART NO.49A found under Light Indicator by The Walter Machine Co Inc. The National Stock Number assigned to this part is 6210013543793, 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 RV-40 PART NO.49A.