These thumbscrew window locks are constructed of heavy-duty extruded aluminum, and each come with a steel thumbscrew. Window locks like these are designed for use on older style horizontal and vertical sliding windows, manufactured with metal frames. The locks fit over the window frame fins and the thumbscrew locks into the outer face of the fin, which can be no thicker than 3/16 in. Other versions of this lock are available with non-marring shoes, with larger/thicker frame fin capacity, with dual thumbscrews for double the holding power, and with single and dual Allen head set screws for tamper-resistant installations. For a non-heavy-duty lock see item no. U-9980 or U-9982. Finish by tightening thumbscrew with pliers to securely lock windows in closed or ventilating positions. For a non-marring lock see U-9820, U-9821, U-10876 and U-10551. For vinyl windows use U-9809 or U-10547.
Compatible with both horizontal and vertical sliding windows
For use with older style, metal framed windows
For use with sliding windows that have a maximum of 3/16 inch thick frame fins
Made of heavy-duty extruded aluminum with steel thumbscrew
These sliding window thumbscrew locks come white in color
Ideal for use as secondary security locks, often used for ventilating or securing windows in closed position
No tools needed for installation
For further dimensional information, please see the line drawing
