Knurled two way screw
thingiverse
I decided that I needed some texture and a spiky feel to it (not a masochist) and thought maybe you would as well. So enjoy ;) Pretty much any 3DP can pull this off with nicely dialed settings ┈┈╱▔▔▔▔▔▔▔▔▔▔▔▏ ┈╱╭▏╮╭┻┻╮╭┻┻╮╭▏ ▕╮╰▏╯┃╭╮┃┃╭╮┃╰▏ ▕╯┈▏┈┗┻┻┛┗┻┻┻╮▏ ▕╭╮▏╮┈┈┈┈┏━━━╯▏ ▕╰╯▏╯╰┳┳┳┳┳┳╯╭▏ ▕┈╭▏╭╮┃┗┛┗┛┃┈╰▏ ▕┈╰▏╰╯╰━━━━╯┈┈▏
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