screw and bolt gauge —

Founded screw and bolt gauge models & stl files for printing
Knob Bolt M4
Perinski
8mm bolt knob
hassanmirza
Knurled M10 Bolt  Nut
mrmechanicen
Adaptable Hex Bolt Wrench
3rDesign Works.com
Restraining Bolt
MakerDan
Lightning Bolt Easy Quick Print
3DManufacturingHub
Brickyard Compatible Bolts
Rexington Beowulf