// 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
);