A nock insert may have an axis of elongation defining an axial direction and radial directions, a bowstring reception surface adapted to receive a bowstring, and an insert portion adapted for insertion into an arrow body. The nock insert may have one or more centering features having one or more spring tabs. Each spring tab may have a first end attached to the insert portion and a second free end extending axially from the first end and having a contact surface. The contact surfaces of each spring tab may be inherently biased outwardly in a radial direction and adapted to be radially deflected upon insertion of the insert portion into the arrow body.