Brass Helical Knurled Inserts:   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. Features : They are compact inserts suitable for insertion in all types of plastics and can be used with hot plastic Moulding and cold plastic molding . Inserts are best suitable for electrical moulded box application. Any kind of Brass Helical Knurled Inserts can be developed and supplied exactly as per Customer Specifications & Requirement.