Staff have his/her interest in different area beyond work. Corporate Capabilities 5000tons monthly nut production ability, 8000tons monthly bolts production ability, 3000tons monthly washer production ability, 5000tons monthly screw production ability. Our Service Quality report cover each order all sizes.Well controlled delivery time.Samples to client for checking before shipment.6 months quality guarantee...China Square Nut suppliers website:http://www.rock-hardware.com/