Ratchet-Stop Thimble—Ratchet-stop thimbles have a constant-force mechanism to ensure repeatable measurements without relying on operator feel. They also have a speeder knob to reduce the time it takes to move the spindle. Once the spindle contacts the surface of the measured object, it will stop tightening, but the speeder knob will continue turning with a clicking sound.

Clamp Nut—Clamp nuts securely hold the micrometer head and provide extra support.

Locknuts—Locknuts lock the spindle in place.