Make a devil out of yourself! I created several types of devil horns to attach to a peaked cap. There are two versions - straight and curved. For the inner part (in the cap) it would be more appropriate to use TPU. 

There are four mounting methods: 

A - just a 2.6mm hole for the screw 

B - during printing, stop before finishing the hole for the M3 nut with a nylon insert, insert it and continue printing 

C - during printing, stop before finishing the hole for the M3 nut, insert it and continue printing 

D - hole for the M3 threaded insert 

Needed parts: 

- M3x10 (max. M3x20) countersunk screw 

- M3 threaded insert 5x5mm or 5x4mm 

Assembly: 

- seal the inserts (or use another method A, B, C) 

- screw the caps on both sides into the ventilation holes

Please give a HEART for the download! We like to collect them. ;-)

PRINT SETTINGS:

Total time → 1 Hour

Number of print files → 4 (one cap)

Layer height → 0,2

Layer width → 0,4

Perimeters → 3

Infill → 20 %

Material → PETG, PLA, TPU

Total weight → 12 g 

Support type → no