T-nut Inserts Used for light duty applications Sizes from 1/4" to 1/8" threads Minimal metal exposed	Double Hex nut Insert Used for medium to heavy duty applications Good torque resistance Good for metal or plastic junctures
Single Hex nut Inserts Used for medium duty applications Provides better torque resistance Minimal metal exposed	Pipe Thread Inserts Used for NPT or other piping applications Hex provides the best torque resistance Can be used as adapters for external valve fixtures or connections