Products
Optimized & Industry-ready Solutions
For All Your Complicated Needs
Stainless steel outer hexagon, nut, serrated washer, double stack washer
Outer hexagon bolt
Outer hexagon nut
Serrated washer
Double stack washer
Various combination screws and pattern screws
Cross recessed pan head screw and spring washer, flat washer assembly GB9074.4
Cross grooved hexagon head bolt and spring washer, flat washer assembly GB9074.13
Hexagon head bolt and spring washer, flat washer assembly GB9074.17
Hexagon cylindrical head screw and spring washer, flat washer assembly
Fixing of photovoltaic panels – drilling screws
Cross recessed drill screw
Cross recessed countersunk head drilling screw
Cross recessed pan head drilling screw
Hexagonal head drilling screw
Wind power Industry Overview
Fastener solutions for wind power industry
As the global demand for renewable energy continues to grow, wind power as a clean and sustainable energy type, its industry prospects are very broad. The wind industry uses wind turbines to efficiently convert wind power into electricity. The stability and energy efficiency of the equipment depends greatly on the quality of the fasteners, which is essential to ensure the long-term stable operation of the equipment.
We provide fastener solutions for the wind power industry, including a variety of fastener products, such as wind power hex, outer hex, high-strength fasteners, locking nuts, washers, cylindrical pins, stoppers, plugs, oil labels, combination fastener products.
In the application of wind power industry, we have rich experience and technical accumulation, and have participated in a number of wind power industry projects, such as: host, tower barrel, gear box, reducer, frequency converter, tensioning, main bearing and wind energy storage projects.
Fastener products we provide (including but not limited to)
High strength fastener
Stainless steel fastener
Surface treated fastener
Locking anti-tension firmware
For the needs of wind power equipment to cope with extreme weather and continuous vibration, the high-durability fasteners provided by Liyi use high-quality steel and advanced heat treatment technology to ensure stability and durability in long-term operation. For example: 10.9 Dacromet bolts, 10.9 black screws, Dacromet washers, Dacromet hex nuts, etc. These high-strength fasteners ensure the stability and reliability of the connection structure.
Wind farms may encounter high humidity, saline soil and other corrosive environment, we can provide stainless steel fasteners for the wind power industry. For example: 316 bolts, 316 cylindrical pins, 316 flat washers, 316 large washers, 316 small washers and stainless steel combination screws and other products.
Carbon steel fasteners through galvanized, dacromet coating, Teflon coating, phosphating, hot dip zinc, chromium plating, nickel plating and other diversified anti-corrosion coating surface treatment process, to provide protection to the base metal, to a certain extent to prevent metal corrosion, further strengthen the corrosion resistance, make the product more beautiful and durable.
To enhance the stability of the equipment structure and reduce vibration during use, we have introduced a series of highly efficient locking and anti-tension firmware. Designed for critical connections in wind turbines to be robust and reliable for use under a variety of loads. For example: lock type round nut, double stack self-locking washer, shaft stop ring and hole stop ring, etc., for the long-term use of equipment to provide a solid and reliable guarantee.
Sealing fastener
Plugs and plugs play a vital role in the sealing of wind power equipment. It not only ensures the air tightness and liquid tightness of the system, but also prevents the erosion and harm caused by external environmental factors on the inside of the equipment, and helps to maintain the stability of the pressure and fluid inside the equipment, thus guaranteeing the performance and efficiency of the entire wind power system.
We adhere to the concept of innovative environmental protection, strengthen cooperation with the energy storage industry, launch high-quality fastener products that meet the needs of the industry, and provide reliable technical support and after-sales service. In the future, we will continue to explore and innovate to provide more perfect solutions for the development of the energy storage industry.
First, why should stainless steel fasteners in the battery energy storage industry control zinc and copper?
Zinc is a reactive metal and copper is a transition metal, so it is easy to react chemically. In the production process of lithium batteries, the two poles react at the same time, and a typical galvanic cell cannot be formed because there is no obvious potential difference.
Due to the many production processes of positive electrode materials, there may be a risk of introducing metal foreign bodies in the manufacturing process. When the battery formation stage voltage reaches the REDOX potential of these metal elements, these metal impurities are oxidized in the positive electrode and reduced in the negative electrode. Accumulation to a certain extent can puncture the diaphragm and cause the battery to self-discharge, or even explode.
Because the production environment of lithium batteries is very demanding, the performance parameters of fasteners used with them have very strict requirements, such as the content of copper in material parameters should be less than 0.5%-1%.
Second, fasteners used in large-scale energy storage scenarios
Battery energy storage system is a kind of renewable energy storage technology, the advantage is that other energy can be converted into chemical energy and stored. For large-scale energy storage scenarios, energy storage devices are crucial.
Corrosion-resistant fastener
Extension fastener
Stainless steel outer hex screws, hex nuts, washers, etc
Part of the energy storage industry equipment is often built on the coast, islands, desolate land. Our factory continues to innovate and develop high corrosion and weathering resistant steel fasteners, which can solve the needs of new energy equipment used in harsh environments. Weathering resistant steel is better than ordinary bolts, and more resistant to Marine corrosion, soil corrosion and atmospheric corrosion.
Some battery energy storage devices need long screw connections, and various kinds of lengthening screws and lengthening screws are generally used.
Fasteners often used in photovoltaic energy storage batteries: stainless steel combination screws and pattern screws, outer hex bolts, hex nuts, washers, etc.
Third, applied to new energy battery PACK fastener solutions
Fastener products are widely used in new energy pure electric vehicles, hybrid passenger vehicles, ships, heavy trucks, construction machinery and other PACK fields.
Outer hexagon bolt assembly
Hex socket set screws
Cross recessed hexagon head with flat spring washer combination screw
Cross recessed pan head flat spring washer combination screw
Our Innovations
Industry-focused products
Wire threaded insert is coiled by the coil of diamond-shaped cross-section, thus forming a standard internal thread, embedded in the threaded hole of plastic, aluminum alloy, copper, cast iron, wood and other soft materials, to achieve the effect of repair and enhancement of the internal thread, realizing high-strength connection of low-strength materials. It has good tensile and torsional properties, and can also convert metric threads to British or American threads freely. At present, the product is widely used in aerospace, instrumentation, rail transit, military, new energy vehicles and other industries. Unilee also provides supporting electric installation tools.
Rivet series include open end rivet, closed end rivet, drum type rivet, maolock, lantern rivet, Hem-Fix rivet, etc. The material are various, including stainless steel, aluminum, iron and so on. Our rivets are of reliable quality and available in stock.
Rivet nuts series have different types of products, including flat head, countersunk head, reduced head, close end, knurled body, round body, full hex body, semi-hex body, inner-hex body, lantern type, etc. The materials are various, such as carbon steel, stainless steel, aluminum, copper.
Press riveting fasteners (refer to the technical standards of PEM,SOUTHCO,POP), embedded fasteners, products are widely used in electronics, chemical and mechanical industries. The main materials are machined easy cut steel, medium carbon steel, stainless steel, aluminum, nylon hex bar and round bar. All materials comply with ROHS green environmental protection standards.
We use high-quality machines such as 5-axis Simultaneous machining
centers and high-end CNC Precision centric lathe, to meet our customers’
special customization needs, and to produce precision parts with tight
tolerances and high surface quality. We strive for the highest standards in
process technology and equipment. We provide precision machining solutions for
a variety of fields including the medical, automotive, hydraulic, and oil and
gas industries. We believe it will bring low cost and high efficiency value to
customers and provide the best quality experience.