Material Brass Exterior finish Brass Type of metal Brass Size 330 Pieces About this item 【Product material】 Knurled nuts are made of durable brass, have excellent corrosion resistance, thermal conductivity and oxidation resistance, to ensure long-term use and easy insertion.< /p> 【Excellent workmanship】Smooth surface without burr, standard circular, firm and even, easy to install. The recess nut has a high precision thread compatible with the corresponding screw and the insert has a guide, so there is no need for countersinking or countersinking. 【Easy to use 】 These heatset inserts can be widely used on injection molding for waterproof fixing. Can be ultrasonically or heat installed into a threaded tapered hole, or molded while injection molded. 【Application】These knurled threaded nuts are widely used in plastic laptop enclosures, plastic enclosures, desktop plastic, GPS plastic enclosures, router plastic enclosures, automotive and electrical injection molding for fixing. Use