This is an EZ Connector set by Dubro.
EZ Connectors link a pushrod to a servo arm allowing it to pivot for
less bind in control surfaces.
FEATURES
Works on 2-56 and smaller wire (.078″)
Permanent or snap on mounting push nuts both included.
INCLUDES
Two brass EZ Connectors
Two plastic snap nuts.
Two metal snap nuts.
Two 2.5×3.5mm slotted head screws.