Genuine Pentax part. This screw holds the film counter dial (the part with the numbers on it) onto your K1000 or Spotmatic camera. Commonly broken because it tightens counter-clockwise. Be sure you install by threading in the opposite direction from normal screws.
If you have any concerns about servicing your own camera, we also offer full-service repairs for all Pentax Spotmatic and K1000 cameras, including both standard repair and also complete restoration services.