Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B3K21-146 found under Connector Plug Elec by Eaton Hydraulics Llc. The National Stock Number assigned to this part is 5935016493515, 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 B3K21-146.