For Quick Release Plates, Cages & Rigs 1/4″-20 Hex Camera Screw Use as Spare or Replacement 0.47″ Total Length This 1/4″-20 Camera Screw from 8Sinn can be used as a replacement when mounting your camera on a quick release plate, baseplate, cage, or rig. Use a 4mm hex key to tighten the screw.