Knob for an 5mm in bolt/nut (8mm head). The bolt will fit in and is a tight fit, I suggest using a press of some sort to get the bolt in, table vice works great.

I recommend supports for the center, PLA will be fine since this designed for hand tightening. For outdoor applications please use PETG, ABS or other similar filaments

I recommend 100% infill, lighter applications you can probably get by with less infill. I have .3mf files for 15%, 50%, 75%, and 100% below.

I will be releasing more of these in every size, metric and standard. Please check if you need another size or leave a comment for a size you need.

https://www.crealitycloud.com/model-detail/691cc78fe7901f72d7191ba9

https://www.crealitycloud.com/model-detail/6917c376aefdcba37ed476fe

https://www.crealitycloud.com/model-detail/691cc8e0dc05cdd3272fb3f2

https://m.crealitycloud.com/en/model-details/68fac09ca44c74d51a0a58e4

m10

https://www.crealitycloud.com/model-detail/6918d67dad9806c8e4414dc0

m12

https://www.crealitycloud.com/model-detail/691b443faaa1f45c4c3ffe06

¼ inch

https://www.crealitycloud.com/model-detail/691c60d31ec89f569d480cd8

5/16 in

https://www.crealitycloud.com/model-detail/691ca063dc05cdd3272cf322

3/8 in

https://www.crealitycloud.com/model-detail/691c9eafdc05cdd3272cd794

Knob for m5 bolt

0.2mm layer, 4 walls, 75% infill

0.2mm layer, 4 walls, 50% infill

0.2mm layer, 4 walls, 15% infill