Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number L21-20R found under Connector Receptacl by Leviton Manufacturing Co Inc. The National Stock Number assigned to this part is 5935016125503, 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 L21-20R.