Ladderlock Buckle - Parametric Replacement for Backpack Straps

Replacement ladderlock buckle for 20 mm straps, so you can fix a broken backpack, bag or gear buckle without unstitching anything. It prints flat with no supports. The gap in the split bridge is cut at 45°, so you can thread the strap on without taking the buckle apart. It’s fully parametric (OpenSCAD source included), so you can adjust it for any strap width. I have printed it in PLA, but would suggest to print it in PETG, especially for outdoor use. For higher durability increase the number of perimeters (walls). The uploaded STL is: - 21mm strap width.

- Size 35 × 26 × 6.5 mm.

- 2.89 g / 0.92 m of filament.

Ladderlock buckle for 20 mm webbing (21 mm slot) – replacement for backpack and bag straps Replacement ladderlock buckle that fixes a broken backpack, bag or gear buckle without unstitching anything. The bridge is split with a 45° gap, so you can fit the strap loop without taking anything apart. It prints flat, with no supports. Print settings - Material: PETG (ASA or nylon also work). I printed mine in PLA, but PETG is better for outdoor use because it resists heat, UV and creep.

- Walls: increase the perimeters for more strength.

- Uploaded STL is: 35 × 26 × 6.5 mm using 2.89 g / 0.92 m of filament

Other strap widths The model is fully parametric. Open the OpenSCAD file (included) and change strap to your webbing width. The slot in the uploaded STL is 21 mm.