Frame bolt. Left.front frame. PartQualifier: front frame. Right.front frame. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Window Regulator Guide Rail to its mounting surface. Door Window Division Bar Bolt. Door Window Glass Surround Channel Bolt. Windshield Washer. Door Glass Surround Channel. Frame. Regulator. Screw.