Hebei Shuangtai Mold Frame Technology Co., Ltd. is one of the most reliable manufacturers and suppliers of cuplock lock pin in China, featured by quality products and good service. Please rest assured to buy discount cuplock lock pin from our factory. We also accept customized orders.
Hongxiang Cuplock Lock Pins are divided into two main categories： upright connection pins and upper cup limit pins. Both are made of one-piece forged steel stamping, without splicing welds. The entire product consists of three sections： the insertion rod body, the annular anti-detachment retaining ring, and the striking end. They strictly conform to the hole diameter standards of JGJ16-2016 cuplock scaffolding specifications. The upright extension pin has a uniform rod diameter of 10mm, compatible with the pre-drilled locking hole of the upright connecting sleeve. The limit pin, paired with the sliding upper cup of the upright, has a retaining ring diameter larger than the cup lock opening, forming a physical anti-detachment limit to prevent the pin from falling off under construction vibration. The ends of the rod body are rounded and chamfered for smooth insertion into the sleeve locking hole without scratching the galvanized layer of the steel pipe's inner wall. The widened striking surface at the tail ensures even force distribution with the hammer, preventing chipping or cracking even after repeated hammering.
Two types of locking pin structures are designed in separate zones. The extended pins on the uprights are longer, while the shorter limiting pins fit the cup-and-groove joints. These can be visually distinguished on the construction site, structurally avoiding the risk of scaffold instability caused by misuse or incorrect installation.
Cuplock Lock Pin Product Characteristics： Forged Steel Base Material Mechanical Properties： Made from national standard thickened Q235 forged steel, the metal grains are refined through high-temperature stamping, eliminating inherent defects such as porosity and delamination. Its shear and tensile strength far surpasses that of thin-material stamped pins on the market. Third-party mechanical testing shows that the single-pin pull-out bearing capacity of this product far exceeds the minimum limit of the specification. It will not deform or bend under long-term vertical pressure from the uprights or repeated pulling from construction vibrations. Traditional recycled material pins are prone to bending and breakage after six months of use, and the upright joints may slip and collapse during high-formwork pouring. Our pins have undergone thousands of fatigue disassembly and assembly tests, showing no plastic deformation, making them suitable for ultra-high full-span scaffolding and continuous turnover of heavy-load bridges.
Ring-shaped retaining ring anti-disengagement structure features： The integrated ring-shaped retaining ring is the core safety design. After the pin is fully inserted into the locking hole, the retaining ring locks onto the outside of the pipe wall, forming a double self-locking mechanism, eliminating the need for additional wire binding. Conventional simple straight rod pins have no limit on their position, making them prone to slipping out in strong winds or during concrete vibration, and falling pins from heights can easily injure construction workers. This product provides permanent physical restraint, eliminating the need for secondary reinforcement after installation. Supervisors can visually check on-site whether the pins are properly inserted, significantly reducing the difficulty of safety inspections.
Fully hot-dip galvanized corrosion protection： The entire set of pins undergoes a closed-loop process of degreasing, multi-stage pickling, hot-dip galvanizing, and passivation, resulting in a stable 70μm zinc layer. There are no uncoated dead corners on the rod body, retaining ring, or striking end. In environments like coastal construction sites with salt spray, high humidity tunnels, and snowmelt corrosion in northern winters, the zinc coating isolates moisture, preventing rust swelling and jamming during long-term use, and preventing thinning due to rust, which reduces shear strength. In contrast, cold-sprayed and cold-galvanized pins experience short-term rusting, resulting in thinner rod diameters, enlarged locking holes, and connection failure.
Standardized Dimensional Adaptability：
CNC stamping ensures uniform rod diameter, length, and retaining ring outer diameter, allowing for free interchangeability of cuplock uprights and sleeves within the same batch, regardless of whether they are new or old, without jamming or improper insertion. The company provides standard 600mm modular uprights, and all sleeve locking holes are standardized, eliminating the need for pin selection when transferring rods across projects, significantly reducing the difficulty of managing rental inventory.
Example：
Construction records from the Zhejiang University Supergravity Laboratory and the Guangzhou Rail Transit project show that after using Hong Cuplock Lock Pins, the labor cost for upright splicing decreased by 32%, auxiliary materials were completely eliminated, lost parts were reduced by 60%, and the frequency of rectification and rework was significantly reduced. For general contractors and leasing companies, although pins are small accessories, they directly affect erection speed, material consumption, and project payment cycles. Hongxiang leverages fully automated forging, CNC dimensional calibration, and standardized galvanizing production lines to optimize the anti-detachment ring structure, dual-specification design, and long-lasting anti-corrosion process, simplifying the entire process of erecting and dismantling cup-lock scaffolding. This achieves comprehensive cost reduction in labor, materials, and construction time for various infrastructure projects.
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