These Cross Knurled Inserts Knurled Brass Inserts are double ended - assist automatic feeding,  increased pull out and torque performance. They are self aligning and hence aid installation process.

   Size :-

3mm , 4mm , 5mm , 6mm , 8mm , 10mm , 12mm , 16mm , 20mm , 1/8" , 5/32" , 3/16" , 1/4" , 5/16" , 3/8", 1/2" , 3/4" , 1" , UNF , BSP , Metric , UNC , UNEF , BSF , NPT , BSPT , R , G , Threads.