Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SM-2R found under Switchradio Frequency Transmiss by R L C Electronics Inc. The National Stock Number assigned to this part is 5930016733009, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SM-2R.