Universal Pegboard Hook - US and Metric

This is my attempt to work out a "standard" spacing for pegboard mounting that will accommodate both the US and metric standards:

• Inch standard = 1" spacing, 1/4" holes
• Metric standard = 25mm spacing, 6mm holes

In order to come up with a size that will both of the above, I came up with this:

• Universal = 25.1mm spacing, 5.5mm holes

Note that this works only for the spacing between two holes; you cannot (for example) multiply this spacing by 5 and get a universal spacing that works between 5 holes. While this hook is useful in its own right, I hope to apply the concept to other prints.

Note also that the cross sectional profile for the hook is square (or "squarish") and not round - this allows for better bed adhesion and improved overall printing. I also experimented with a hexagonal cross-section, but this caused major problems with bed adhesion (even with a brim) due to the lower bed contact surface area.

Note : I only have inch standard pegboard in my shop, but I made some pegboard test blocks to verify that it works on metric spacing; see here :

https://www.prusaprinters.org/prints/54646-pegboard-test-blocks-inch-and-metric

The OnShape 3D CAD files for this are here :

https://cad.onshape.com/documents/68fc6059641ec3807e29da1b/w/624c5ad9ac20beca2624a596/e/9fa2d2eabad53b87359859d5

Print instructions

Print in PLA using the 3mf file provided; otherwise :

• brim NOT required, but make sure your first layer contact is well tuned; a bit of glue is also helpful.
• perimeters = 5
• 0% infill

For a maximum strength solid hook, increase perimeters to 8.