Thread Gauge Heat Insert Guide (in & mm)

The design intent was two-fold:
To have useful Imperial & Metric models for checking thread-size on loose screws, and to have readily on hand design guides and visual aids when designing for heat inserts and for gauging thickness of materials.

These models use heat inserts made for plastic. I purchased mine through Mcmaster Carr but you may be able to find them through another supplier. I am not affiliated with Mcmaster in any way but love using their website for things like this, as they