Dongguan AOYI hardware Co Ltd. was set up in 01 Apr 2009. We have 45sets of Taiwan advanced heading machine 10 sets of multi-location cold header, 46 sets of thread rolling machines as well as the lathingmilling,grindingdrilling and other processing auxiliary.,br>br>AOYI Screw” has enthusiastic customer service team” Careful engineering R D team& Professional manufacturing technology team Discerning quality testing team! Advanced quality testing equipment The main supporting test! measuring instruments are as following 5 sets of Taiwan optical sorting machines:1 set of plating thickness measuring machine1 set of Tensile testing machine,2 sets of micro-hardness tester1 set of rockwell hardness tester, 2 sets of salt spray test machine, 2 sets of projector 6 sets of TOHNICHI torque meter ,metallographic analysisbrittleness test machine ,including freezing test) the detection head fracture test devicesNHK depth gauge,Chengliang KKS thread ring gauge& Chengliang KKS thread plug gauge and ROHS environmental testing equipment&which ensure us to offer the perfect quality products. br