General description These TIMCO Window Fabrication Screws are designed for versatile applications, allowing for the fitting of various hardware to frames that lack steel or aluminum reinforcement. The screws feature a countersunk head with ribs underneath, which enhances the countersinking process for a flush finish. Technical specifications Type: Countersunk with ribs Thread: Single thread Point: Gimlet point Material: Zinc Dimensions: 4.3 x 45 mm