UNC Thread objects for negative parts

STL models of thread which can be used as negative parts (or use boolean operations) in your slicer to add threaded holes in your model without need of CAD program. All models with parts pitch:1/4" -205/16" - 183/8" - 167/16" - 141/2" - 135/8" - 113/4" - 107/8" - 91" - 81 1/8 " - 71 1/4 " - 71 1/2" - 61 3/4" - 52" - 4 1/2 Check also ISO Metric Thread objects for negative parts