Added script

Dynamic Washer.scad

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+// Customizable Washer
+// A simple, parametric flat washer for 3D printing or CAD assemblies
+
+module washer(
+    inner_diameter = 6,    // Diameter of the center hole (mm)
+    outer_diameter = 12,   // Outer diameter of the washer (mm)
+    thickness = 2,         // Thickness/height of the washer (mm)
+    resolution = 64        // Circle resolution ($fn). Higher values produce smoother circles (64–128 recommended)
+) {
+    difference() {
+        // Outer cylinder
+        cylinder(
+            d = outer_diameter,
+            h = thickness,
+            center = true,
+            $fn = resolution
+        );
+        
+        // Inner hole (slightly taller to guarantee complete subtraction)
+        cylinder(
+            h = thickness + 2,
+            d = inner_diameter,
+            center = true,
+            $fn = resolution
+        );
+    }
+}
+
+// ──────────────────────────────────────────────────────────────
+// Example usage – change these values to generate your washer
+// ──────────────────────────────────────────────────────────────
+washer(
+    inner_diameter = 4,    // ← modify this value
+    outer_diameter = 10,   // ← modify this value
+    thickness      = 0.2,    // ← modify this value
+    resolution     = 256
+);