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UK StarLock Star-Type Push-On Locking Flat Washers; Imported Stainless Steel Lock Washers
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In fields such as industrial manufacturing, automotive engineering, and aerospace that have strict requirements for connection reliability, traditional flat washers often cause bolt loosening due to vibration and load changes, leading to equipment failures and even safety accidents. However, the UK StarLock star-shaped push-type locking flat washer (referred to as "StarLock Locking Washer" for short) has broken the functional limitations of traditional washers by virtue of its unique star-shaped structural design and push-type locking principle, becoming an innovative solution to solve the loosening problem of precision connections. As a core product of a well-known British fastener brand, the Starlock washer has set a performance benchmark for locking washers in the global precision manufacturing field with its characteristics of "tool-free installation, long-term anti-loosening, and wide adaptability".
From the perspective of structural design, the core competitiveness of the StarLock star-shaped push-type locking flat washer lies in its integrated star-shaped structure and push-type locking mechanism. Different from the smooth annular structure of traditional flat washers, the outer ring of the Starlock washer is evenly distributed with 6-8 radial elastic star teeth, and the inner ring is designed with anti-slip threads that match the bolt threads. Some models also have wear-resistant coatings added to both sides of the washer. This structure is not just a simple form innovation, but based on the dual locking logic of "mechanical engagement + elastic preloading": when the washer is pressed between the bolt and the connected part, the star teeth on the outer ring will undergo elastic deformation under the action of axial pressure, tightly "biting into" the surface of the connected part to form mechanical engagement points; at the same time, the anti-slip threads on the inner ring fit closely with the bolt threads, increasing the friction between the threads and preventing the bolt from retracting due to vibration. More importantly, its "push-type" installation feature - no additional tools are needed, and the automatic deformation and locking of the star teeth can be achieved only by relying on the axial thrust generated when the bolt is tightened, which greatly simplifies the installation process and does not cause excessive damage to the surface of the connected part.
The core advantages of the StarLock star-shaped push-type locking flat washer are concentrated in three dimensions: "efficient anti-loosening, wide adaptability, and long-term durability", and each advantage has been verified by long-term industrial scenarios. Firstly, the "efficient anti-loosening" performance: traditional flat washers rely on static friction for anti-loosening, which is prone to failure under high-frequency vibration or alternating loads. However, the Starlock washer can reduce the loosening risk by more than 90% through the dual action of the mechanical engagement of the star teeth and the anti-slip threads on the inner ring. According to the brand's test data, under the simulated working conditions of a vibration frequency of 10-500Hz and an amplitude of 0.5mm, the tightening torque attenuation rate of the M8 bolt equipped with the Starlock washer is only 5% after 2000 hours of testing, which is much lower than the attenuation rate of more than 30% of traditional flat washers, fully meeting the usage requirements of high-frequency vibration equipment such as automobile engines and motors.
Secondly, the "wide adaptability" feature: in terms of bolt specifications, the Starlock washer covers common thread sizes from M3 to M24, and both metric and imperial bolts can be adapted by replacing the inner ring threads; in terms of the material of the connected part, the elastic deformation range of its star teeth is precisely designed, which can not only form a reliable engagement on the surface of soft materials such as aluminum alloys and plastics without crushing the materials, but also adapt to hard materials such as steel and cast iron, without the need to adjust installation parameters separately according to the material; in terms of connection scenarios, it can be used in various scenarios such as static fixation (e.g., equipment enclosures), dynamic loads (e.g., transmission components), and high-temperature environments (e.g., engine compartments), with an adaptive temperature range from -50℃ to 200℃, meeting the needs of most industrial environments.
Finally, the "long-term durability" advantage: the washer is made of high-quality spring steel or stainless steel, and after quenching and tempering heat treatment and surface phosphating treatment, its corrosion resistance and fatigue resistance are far superior to ordinary carbon steel washers. Taking the StarLock Washer made of 304 stainless steel as an example, in the neutral salt spray test, its corrosion resistance time can reach more than 500 hours, while that of ordinary carbon steel washers is only about 100 hours; in the fatigue resistance test, after 100,000 cycles of alternating load, the elastic deformation capacity of the star teeth still maintains more than 85% of the initial state, ensuring that the locking function will not decrease due to fatigue failure of the star teeth after long-term use.
In practical application scenarios, the StarLock star-shaped push-type locking flat washer can be found in many high-demand fields, and shows differentiated application strategies according to scenario requirements. In the field of automobile manufacturing, it is a core supporting component for engine cylinder head bolts and gearbox connection bolts - the high-frequency vibration and high-temperature environment during engine operation have extremely high requirements for the anti-loosening and temperature resistance of the washer. The star tooth engagement design of the StarLock Washer can effectively resist vibration, and at the same time, the stainless steel material can cope with the oil pollution and high temperature in the engine compartment, avoiding rust failure of the washer. Some high-end automobile manufacturers also use it for the connection of chassis suspension systems, and buffer road impact through the elastic deformation of the washer to reduce the wear of suspension components.
In the aerospace field, the lightweight and high reliability of the StarLock Washer make it the first choice for small aerospace equipment - in scenarios such as the motor connection of UAVs and the instrument fixation of satellites, the washer is required to have strong anti-loosening ability while controlling weight. The thin design (thickness of only 1.2-3mm) and high-strength material of the StarLock Washer can achieve a balance between weight and performance, and will not affect the flight performance of the equipment due to increased weight.
In the field of electronic equipment, the "non-damaging" installation feature of the StarLock Washer is highly favored - the enclosures of precision electronic equipment such as routers and servers are mostly made of aluminum alloy or plastic materials. The hard contact of traditional washers is prone to cause surface scratches, while the star tooth elastic deformation design of the StarLock Washer can control the surface indentation depth within 0.1mm while achieving reliable locking, meeting the requirements of electronic equipment for appearance and structural integrity.
To give full play to the performance of the StarLock star-shaped push-type locking flat washer, correct installation and selection methods are crucial, which are also the key links distinguishing it from traditional washers. Two core points should be noted during installation: first, "axial pressure control". Although no additional tools are needed for the washer, the tightening torque of the bolt must strictly follow the recommended value - insufficient torque will lead to insufficient deformation of the star teeth and failure to form effective engagement; excessive torque may cause the star teeth to break or damage the surface of the connected part. It is recommended to refer to the torque comparison table provided by the brand according to the bolt specification (e.g., the recommended torque for M8 bolts is 15-18N·m), and use a torque wrench if necessary. Second, "installation direction". Some StarLock Washer models are designed with front and back sides (e.g., single-sided coated models), and the coated side should face the connected part to ensure the fit between the star teeth and the surface, and avoid affecting the anti-loosening effect due to incorrect direction.
In terms of selection, three factors should be comprehensively considered: first, load and vibration conditions. For high-frequency vibration or heavy load scenarios (e.g., motors, transmission components), models with more star teeth (e.g., 8 teeth) and made of spring steel should be selected to enhance the engagement strength; for static light load scenarios (e.g., equipment enclosures), models with 6 teeth and made of stainless steel can be selected to balance cost and performance. Second, the material of the connected part. For soft materials (e.g., plastic, aluminum alloy), models with rounded star tooth tips are recommended to avoid crushing; for hard materials (e.g., steel), models with sharper star tooth tips can be selected to improve the engagement depth. Third, environmental factors. For humid or corrosive environments (e.g., outdoor equipment, chemical scenarios), 316 stainless steel materials with Teflon coating should be preferred to enhance corrosion resistance; for high-temperature environments (e.g., engine compartments), high-temperature resistant spring steel materials should be selected to ensure that the elasticity of the star teeth does not attenuate.
As an innovative product in the field of precision locking, although the UK StarLock star-shaped push-type locking flat washer is small in size, it has redefined the functional boundary of washers - it is no longer a simple "spacer component", but an active locking element integrating anti-loosening, buffering, and protection. In the current era where industrial manufacturing is developing towards "high precision, high reliability, and lightweight", the StarLock Washer, with its technical advantages, has not only become a standard component in fields such as automotive, aerospace, and electronics, but also promoted the upgrading of locking technology from "passive anti-loosening" to "active locking". In the future, with the emergence of new materials (e.g., carbon fiber composites) and new scenarios (e.g., new energy battery connections), the StarLock Washer will further optimize its structural design, such as developing flexible star teeth suitable for composite material surfaces and intelligent washers with temperature monitoring functions, continuously providing more efficient and reliable solutions for precision connections.
Zhuhai Jiali Hardware supplies UK StarLock star-type push-on locking flat washers and imported stainless steel lock washers. We offer a complete range of specifications, fast delivery, and guarantee 100% original imports.
The main materials of our products include stainless steel and spring steel. We provide preferential prices. Welcome to inquire!
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JIALI FASTENER