BI-METAL
Thin Sheet Screws
SS304+SCM435
Faster drilling speed due to double threads design
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ROOFING FASTENERS & PLATES
Produced according to FM4470 requirement
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KNURIED FAST-TAPPING WOOD CONSTRUCTION SCREWS
EU CE certificated, for the connection and fastening of wood structures or panels
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HOT PRODUCTS

VALLEY FIXING FASTENERS

Hex Big Flange Self-drilling Screw With EPDM Washer
Hex big washer self-drilling screws, for fastening steel sheet to metal, especially for fixing the valley of metal roof and wall curtains constructions.
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Color Ruspert Coating Hex Washer Self-drilling Screws
Phillips flat head countersunk self-drilling screws, widely used in a variety of applications, structure fixing, OSB fixing, fine thread could provide faster drilling speed and stronger fastening ability.
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Phillips Pan Head Fine Thread Heavy Duty Self-Drilling Screws
Phillips pan head self-drilling screws for steel, mainly used for steel structure fixing, fine thread could provide faster drilling speed and stronger fastening ability, #5 point could easily drill through max 12mm steel plate.
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Hex Flange Self-drilling Screws With EPDM Washer
Hex intended washer head self-drilling screws, using bounded EPDM washer, for fastening steel sheet to metal, especially for fixing the valley of metal roof and wall curtains constructions.
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Fine Thread Phillips Flat Head Countersunk Self-drilling Screws
Phillips flat head countersunk self-drilling screws, widely used in a variety of applications, structure fixing, OSB fixing, fine thread could provide faster drilling speed and stronger fastening ability.
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Fine Thread Hex Washer Self-drilling Screws
Hex big washer self-drilling screws, for fastening steel sheet to metal, especially for fixing the valley of metal roof and wall curtains constructions.
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WHO WE ARE

ABOUT TGR SCREWS

Professional production of self tapping screws and self drilling screws
Tsingri established in 2022, as a new brand of Tengri Fasteners, we only produce self-tapping screws and self-drilling screws.

Our main products focus on Roofing Construction Fasteners, Timber Construction Screws, Concrete Construction Screws. Roofing Construction Fasteners includes Metal Roofing Screws and Insulation Roofing Fasteners and Plates.
Quality Assurance
After-sale Service
Fast Delivery
Specially Produce
TGR SCREWS

PRODUCT CATEGORY

Fine Thread Phillips Flat Head Countersunk Self-drilling Screws
Phillips flat head countersunk self-drilling screws, widely used in a variety of applications, structure fixing, OSB fixing, fine thread could provide faster drilling speed and stronger fastening ability.
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Fine Thread Hex Washer Self-drilling Screws
Hex big washer self-drilling screws, for fastening steel sheet to metal, especially for fixing the valley of metal roof and wall curtains constructions.
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Hex Big Flange Self-drilling Screw With EPDM Washer
Hex big washer self-drilling screws, for fastening steel sheet to metal, especially for fixing the valley of metal roof and wall curtains constructions.
View More
TGR SCREWS

LATEST BLOG


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Self-Drilling Screws for Metal Cladding: A Guide to Hex Washer Head vs. Pan Head Selection

Cladding fastener selection is where projects are won or lost — not during installation, but over the ten years that follow. A correctly specified fastener is invisible. An incorrectly specified one becomes a visible, recurring maintenance problem: corrosion streaks down the facade, membrane breache

2026-04-28
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Bi-Metal Self-Drilling Screws: Why SS304+SCM435 Outperforms Single-Material Alternatives

There is a specific engineering problem at the heart of every coastal roofing or solar installation project: you need a fastener strong enough to drill through steel, resistant enough to last decades in a corrosive environment, and electrochemically safe to use with aluminium.

2026-04-10
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How to prevent hydrogen embrittlement?

Hydrogen embrittlement is largely unpredictable, and efforts to avoid it must start at the design stage to determine the characteristics of the part and the subsequent manufacturing process.Avoiding hydrogen generation during manufacturing and hydrogen absorption by fasteners eliminates the risk of

2023-09-17
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What Is Ruspert Coating?

Ruspert coating is a type of surface coating that provides corrosion resistance and enhanced durability to metal surfaces. It is a combination of a base coating and a topcoat, typically consisting of a zinc or zinc-alloy base layer and a ceramic or organic topcoat.The base layer of Ruspert coating i

2023-11-10
TGR SCREWS

FREQUENTLY ASKED QUESTIONS

  • Q What links should be paid attention to in the screw production process?

    A
    As we all know, no matter what kind of screws, they have become very important fasteners in our lives, the small screws play a pivotal role in any field.
     
    Self-drilling screws have also been recognized in the industry because they can adapt to any harsh environment. Of course, no matter how good the self-drilling screw is, we need to focus on the quality control process.
     
    First of all, we have specific requirements for the rinsing process of SDS screws, but this process is often ignored by many people. The rinsing step must be done after cleaning with silicate cleaning agent. When tempering and heating, the stacked SD screws should be qualified, otherwise the drilling screws in the quenching oil will be slightly oxidized. If white residues appear on the surface of the drilling screws, it means that the inspection during the operation is not careful enough.
     
    And then, the heat treatment of self-drilling screws must be strictly controlled. According to different products, different diameters, different lengths, and combined with the customer's final application scenario for the screw, it must be based on different heat treatment processes.
     
    Tsingri specializes in the production of door and window screws, curtain wall screws, drilling screws, composite (Bi metal) screws, stainless steel drilling screws, high-strength carbon steel screws, stainless steel fasteners, photovoltaic bracket bolts, light steel house screws, solar panel special screws, etc.

  • Q Tsingri is manufacture or trading company?

    A

    Tsingri is a manufacture company, TSR is our brand.

    We only produce self-tapping screws and self-drilling screws, 
    main products are metal roofing fasteners, insulation roofing fasteners and plates, decking screws, bi-metal screws.

    In 2011, we transformed from trading to manufacturing, mainly to serve high-quality customers in the local market.

    From 2019, we began to produce products exported to European and American markets through partners, mainly OEM orders.

    In 2022, in order to better serve the international market, the TGR brand was established.

  • Q Why Tsingri screws are the best choice for your next construction project?

    A

    Tsingri screws are the best choice for your next construction project because of their superior quality, performance, and design features. As the most reliable and trustworthy fastener available on the market, these screws deliver an impressive level of holding power while remaining easy to install.
     
    Tsingri screws are specially designed to be heat-treated, making them exceptionally durable. These screws are also equipped with diamond tips, so they can effortlessly penetrate hardwood as well as other materials. Moreover, Tsingri screws feature optional coatings, such as galvanizing, to provide additional protection and resistance against corrosion.
     
    Another reason why Tsingri screws are the best choice for your next construction project is their cost-effectiveness. Not only do these screws offer high-performance and superior quality, but they also come at an affordable price. Tsingri screws can even help to lower labor costs by reducing the amount of time needed for installations.
     
    These screws also feature unique square-drive heads that reduce slip off, which increases the screw’s efficiency. With their wide range of thread lengths and specialized heads, these screws are also suitable for any task, no matter how big or small.


  • Q What screws head type you could provide?

    A
    We could provide you with many different head types, standard screw heads and customized screws.

    Our main screw heads are:

    Bugle Head, Flat Head, Hex Head, Truss Head, Wafer Head, Pan Head, Oval Head, Button Head, Binding Head, Countersunk Head, Undercut head.



  • Q What materials we could choose for the fasteners?

    A
    Carbon Steel: 1022, 10B21

    Stainless Steel: 304, 316, 410

    Bi-metal: SS304/SS316+SCM435



TGR SCREWS

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TSINGRI FASTENERS

Tsingri screw as a professional manufacturer, we only produce self-tapping screws and self-drilling screws.
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