Tired of ugly screw heads ruining the sleek look of your 3D printed parts or woodworking projects? Welcome to the ultimate hardware solution. This specific set is precision-engineered perfectly for M4 metric flat head screws (ISO 10642 / DIN 965).

Every washer features an accurate 90° chamfer and a precisely calculated 0.1mm depth clearance, ensuring your screw heads sit perfectly flush—or just a hairline below the surface—for an incredibly satisfying, professional look.

✨ The M4 9-Piece Matrix: Forget "one size fits all." This M4 set includes a complete matrix of 9 distinct variations so you can choose the exact footprint and strength you need for your specific project:

• Widths (Outer Diameter): 12mm, 15mm, 18mm
• Thicknesses: 2.5mm, 3.0mm, 4.0mm

🎛️ Parametric & Scalable Base: Need a slightly thicker base? Simply scale the Z-axis in your slicer. Need a wider footprint? Scale X and Y uniformly. The geometry holds up beautifully.

🚀 Effortless Printing: Designed to print 100% flat on the build plate. Absolutely NO supports required. Print a whole plate of these in minutes!

🛠️ Material Agnostic: Print them in PLA for basic projects, PETG/ABS/ASA for high mechanical strength, or even TPU for vibration-dampening soft mounts.

📐 Technical Details:

• Chamfer Angle: True 90° (45° from vertical) to match standard M3 flat head screws.
• Clearance: Through-holes are slightly oversized to account for 3D printer tolerances and ensure a drop-in fit.
• Recess: Calculated with a built-in 0.1mm depth buffer so your screws never protrude.
• Reinforced Base: Every model maintains a solid bottom layer to prevent crushing under high torque.

⚙️ Recommended Print Settings:

• Layer Height: 0.12mm - 0.20mm (lower layer heights give smoother chamfers).
• Walls/Perimeters: 3 to 4 walls (crucial for structural strength when tightening).
• Infill: 15-25% Gyroid (or just use 100% infill/all perimeters since they are small parts).

Drop a like, share your makes, and let me know if you need any custom dimensions in the comments! Happy printing! 🛠️