General description These TIMCO Window Fabrication Screws are designed for multiple applications, particularly for fitting various hardware to frames that lack steel or aluminum reinforcement. Their countersunk head features ribs underneath, which enhance the countersinking process, ensuring a flush finish. Technical specifications Diameter: 4.8 mm Length: 25 mm Type: Countersunk with ribs Thread: Single thread Tip: Gimlet tip Material: Stainless steel