... of Shanghai XingRui Bolt Factory. Thecompany is a private-owned enterprise with a total capital of RMB 30 million which ... -sized hot heading equipments and supporting detection equipments. And a Research & Development Department has been established,and we canmanufacture ... 2, 5 and 8.7. Various nuts, flat gaskets, spring washers, mechanical bolts, tapping screws, fibreboard screws and hexagonal wood ...