Bolt, Nut, Screw manufacturer / supplier in China, offering China Manufacturer′s Brass M2 M3 M4 M5 M6 M8 Threaded Insert Nut Knurled Nut Inserts for Healthcare and Mining Applications, 6-32 1/4-20 8-32 Knurled Brass Heat Staking Threaded Inserts Brass Insert Nut Knurled Nut for Injection Molding, OEM M2 M3 M4 M5 M6 M8 M10 Copper Knurled Inserts Nut Brass Melt Insert Brass Nut Manufacturer for Plastics Insert and so on.