Basic Little Bracket for Joinery - 3x1-1/4 inch - 4.2 & 9.2 mm thickness

I am currently in the midst of a woodworking “scrap build” that could only generously be described as “improvised.”

I needed a super simple bracket to help me join butted wood scraps together.  I am doing a lot of this build with leftover cabinet scraps (¾" thick), so there is no a lot of weight involved.  It's more about making things co-planar and held in place.

This stupid, dumb little bracket prints relatively quickly and is WILDLY stronger than I'd planned.

• Bracket has 4 screw holes per “side”
• 3 inches long
• by 1-¼ inches wide
• 4.2mm & 9.2mm thick versions

Keep in mind that I have not DIRECTLY tested alternate print methods.  I am giving you what worked for me.  You can likely lower some thresholds, here, but do so knowing I've not tested others.

Also, these are not holding anything truly heavy-duty or with weight to bear.

Print flat with…

• PLA - I used the BambuLab PLA Tough (discontinued) so maybe bump up if it's basic
  • 4 or more walls
  • 50% gyroid infill works well, but I felt better with 60%
  • 5+ top layers
  • 4+ bottom layers
• PETG - I used Sunlu
  • 3 walls
  • 42% infill
  • 4 top layers
  • 4 bottom layers

I used a 0.6mm nozzle at .42mm and .3mm layers with no real noticeable difference other than print time.

Top surfaces were never pretty, but this is purely functional.

The screw holes are made for standard wood or deck screws with about an 8.2mm head (8.4 in the f3d file).

To note, if you're working with ACTUALLY ¾ inch material, the 4.2mm version works well with ½ inch screws. 

The 9.2mm version was so I could use the 1-¼ inch stuff without piercing the opposite side.