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Understanding Tek Screws A Deep Dive into 25mm Options

4. Reusability Many hex head bolts are designed for multiple uses, making them an economical choice in various scenarios.

4. Self-Drilling Anchors These anchors come with a sharp tip, allowing them to be easily installed without pre-drilling a hole. They are especially useful for quick, hassle-free installations in drywall.

The terms 3% and 4% often relate to the percentage of the anchor bolt’s yield strength in relation to the concrete’s compressive strength. For example, a 3% concrete anchor bolt means that the bolt can withstand loads up to 3% of the concrete's yield strength, while a 4% bolt can handle loads up to 4%. This distinction is vital for engineers and contractors, as it influences load calculations, safety factors, and the overall design of the structure.