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OnlyScrews on Instagram: "🔩 How to Measure Screw Size Properly! Ever wondered if you’re picking the right screw size? Here’s a quick 3-step guide 👇 1️⃣ Measure the Diameter (Thickness) – Use a digital or vernier caliper and measure across the threaded part of the screw, not the head. This gives you the screw’s diameter (example: 4 mm = M4). 2️⃣ Measure the Length – Place the screw on a flat surface and measure from the base of the head to the tip. For flat-head screws, measure from the top to