Developer: Bayard Design

EngMachRef is the premiere reference application for engineers, machinists,
designers, draftsman hobbyists, and more! It has all the tables and calculators
you need to successfully design...

Screw Sizer allows you to determine what size screw or bolt or nut you have whether its UNC, UNF or ISO/Metric thread!

Just match it to its major (grey) or minor (black) diameter for...