Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R1399 found under Insert Switch Actuating by United States Postal Service. The National Stock Number assigned to this part is 6210004517781, 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 R1399.