Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RC90-B-R found under by Visual Communications Company Llc Dba Vcc. The National Stock Number assigned to this part is 5340016980940, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RC90-B-R.