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Winrock is professional supplier for special fastener, it establish an office on shanghai city, manufacture base is in Dongtai city, Jiangsu Province.

Production are widely application for Oil and gas, Petrochemical ,Power generation, Pressure vessel, Valve... We could machine fastener as international standard or special requirement. Winrock have fastener machining equipments completely, could make hot forging, CNC turning, rolling thread, heat treatment process. our equipment could machine bolts & nuts size M8-M100, length 0-2000mm. We have more special materials bar and end production in stock.

Winrock have strict inspection system, including chemical element analysis, physical metallographic, mechanical (350℃ tensile, -110℃ impact test), UT test,ect.


Winrock Materials:

-Stainless steel: SS304L, SS316L, SS316Ti, SS317L, SS321, SS347, SS310, SS410

-Super Duplex: UNS S31803, S32205, S32550, S32750, S32760

-High Temperature Alloy: A453 660, Alloy20, 17/4PH, 17/7PH, 904L, XM-19, SMO254

-Nickel Alloy: Inconel 600, Inconel 601, Inconel 602CA, Inconel 625, Inconel 718
Incoloy 800, Incoloy 800HT, Incoloy 825, Incoloy 925, Hastelloy C22, C276

-Nickel-Copper: Monel 400, Monel K500

-Titanium Alloy: Titanium Gr2, Titanium Gr5, Titanium Gr7

Winrock Products:

Hex Bolts/ Hex Cap Screws/Socket Head Cap Screws

Hex Nuts/Cap Nuts/Circular Nuts/Nylon Nuts

Engineering Stud: Stud bolts, Double Stud, Thread Rod

Special fastener: U Bolts, Eye Bolts, Anchor, Flange Bolts, Flange Nuts

Washer: Flat Washers, Spring Washers, SQ Washers

We supply perfect fastening solution way. in foreign market, included UAE, Malaysia, Japan,UK, France,Italy, Australia, ect

Winrock always keep the core values that is for professional, quality, commitment, the target goal is win to win with customers