M2.5 - M30 Knurled Thumb Screws in all sorts of lengths (incl. STEP) - Print in Place

⭐ Hit Like and stash it in your collection – your future self will thank you! ❤

A collection of Knurled Thumb Screws, ranging in sizes from M2.5 to M30, each available in lengths of 10 mm, 16 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm and 120 mm.

Looking for Torx, Hex, or Phillips screws – with or without heads? Or maybe nuts? I’ve got you covered – including easy-to-grip nut caps. The collection keeps growing!

Print Instructions

Settings for PrusaSlicer

• Layer Height: 0.1 mm (Print Settings → Layers and Perimeters  → Layer Height) – For maximum strength and detail in the screw threads.
• Infill: at least 40% (Print Settings → Infill → Fill Density) – Ensures strong, durable prints.
• Support: Support on Build Plate only (Print Settings → Support Material → Support on Build Plate only) - Improves bed adhesion while still allowing the support to be removed easily.
  • Overhang Threshold: 30° (Print Settings → Support Material → Overhang Threshold)  
  • First Layer Density: 15% (Print Settings → Support Material → First Layer Density)
• Extrusion Multiplier: 0.93 (Filaments → Filament) – Prevents threads from being too tight.
• Max Print Speed: 100 mm/s (Print Settings → Speed → Auto Speed (advanced)) – Improves results with fine threads.
• Fill Pattern: Gyroid (Print Settings → Infill) – Provides strength in all directions, prints efficiently, and saves material.

Best Filaments for Functional Screws

For most functional printed screws, PETG offers the best balance between printability, strength, and durability. It is less brittle than PLA and easier to print than ABS or Nylon, making it ideal for threads that will be used repeatedly or under moderate stress. If you need maximum strength and your setup allows, Nylon or ABS are excellent alternatives. However, you will need an enclosure for printing with Nylon or ABS.

I’m really happy to see your makes and hear your feedback on these screws. 

These models were created in OpenSCAD using the BOSL2 library.