Comparison : Item # MA-0510, Economy - Threaded Insert - Through Hole - Inch
Item # MA-0512, Economy - Threaded Insert - Through Hole - Inch
Item # MA-0514, Economy - Threaded Insert - Through Hole - Inch
Item # MA-0516, Economy - Threaded Insert - Through Hole - Inch
Item # MA-0518, Economy - Threaded Insert - Through Hole - Inch