Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S20S21 2R found under Connector Receptacl by Lionel Electronic Laboratories. The National Stock Number assigned to this part is 5935006605920, and the Federal Supply Class is 5935 Connectors Electrical. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S20S21 2R.