Welcome to Tongna hardware manufacture Co.Ltd.
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Professional fastener system engineering manufacturer

Ahead of the international advanced management level, to meet the customer satisfaction as the stand

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0571-86632760

Screw series

Screw products including mechanical screws, slotted ordinary screw, inner six angle and six spline type screws, cross recessed screws, common fastening screw, self tapping screws, self tapping screws and bolts for customer specific requirements of high precision.

  • Product
  • Product Parameter

The screw specification is 0.8-20mm in diameter, and the production length is 2-200mm. It can be made of iron, stainless steel, medium carbon steel, copper, aluminum, plastic, nylon and so on. The mechanical grades are CLASS-4.8, 6.8, 8.8, 9.8, 10.9, and 12.9. The surface treatment of Trivalent Chromium Color zinc, trivalent chromium blue white trivalent chromium zinc, black zinc, white zinc, nickel chromium green, black nickel, chromium, Dacromet, geomet, tin, nyloc, blackening, waxing etc.. Has passed the TIS16949:2009, GBT28001-2011, IS09001:2008, IS014001:2004 system certification.