Qingdao Haosail Machinery Co., Ltd.

320C/320A Eye hook with Latch Features:

• Integrated Eye Design for Secure Rigging Connection. A key distinguishing feature is its fixed "eye" (circular or oval-shaped top opening) at the shank end. This eye is precision-forged to provide a smooth, high-strength connection point for rigging hardware—such as shackles, bolts, chains, or wire ropes. Unlike swivel hooks, the 320C/320A’s static eye design ensures stable alignment when paired with fixed anchor points (e.g., crane hooks, trailer D-rings) and eliminates rotational stress on attached components, making it ideal for applications where load positioning requires rigidity.

• Spring-Loaded Safety Latch for Anti-Disengagement Protection. Equipped with a heavy-duty, spring-loaded safety latch (also called a "keeper" or "gate") that covers the hook’s throat (opening). The latch automatically closes and locks into place once the hook is attached to a load ring, chain link, or anchor—creating a fully enclosed connection. This prevents accidental load detachment due to vibration (e.g., during truck transit), sudden load shifts, or operator error. The latch is also easy to manually open (via a small tab or lever) for quick hook placement/removal, balancing safety and efficiency.

• High-Tensile Alloy Steel Construction. Manufactured from premium heat-treated alloy steel (common grades include A36, A588, or quenched-and-tempered steel), the 320C/320A hook delivers exceptional tensile strength and impact resistance. The heat-treatment process (quenching + tempering) enhances the material’s ability to withstand heavy loads without deformation, bending, or cracking—even in low-temperature or high-stress environments. This construction ensures the hook meets strict working load limit (WLL) requirements, typically ranging from hundreds to thousands of pounds (specific WLL varies by size/model).

• Optimized Hook Throat & Bow Geometry. The hook’s throat (width of the opening) and bow (curved body) are engineered to fit standard load-securing hardware, such as G70/G80 chain links, load rings, or shackle pins. The throat width is sized to provide a snug, non-slip fit for compatible components, while the curved bow distributes load forces evenly across the hook’s structure—reducing stress concentrations at critical points (e.g., the hook’s tip or eye base). This design minimizes the risk of premature wear or failure under rated loads.

320C/320A Eye hook with Latch Typical Applications:

• Heavy equipment lifting: In factory workshops, shipyards, metallurgical plants and other scenes, it is often used to connect the hook of cranes and cranes with the objects to be lifted (such as machine tools, pressure vessels, steel components). 320A (alloy steel material) is suitable for lifting heavy equipment due to its higher strength (usually working load 1-50 tons); 320C (carbon steel material) is suitable for medium and light goods (such as motors and molds). The locking device (Latch) can prevent the chain and wire rope from accidentally falling off during the lifting process, especially in high-altitude lifting or complex working conditions (such as swinging and rotating), which can significantly improve safety. For example: When lifting large steel structures, use 320A eye hooks to connect the wire rope and the component lifting point, and the locking buckle clamps the end of the wire rope to prevent it from falling off due to vibration. Assembly line and warehouse lifting: In automated production lines or warehouses, it is used with electric hoists and hand hoists for frequent lifting of small and medium-sized goods (such as wooden boxes and palletized materials). The locking design reduces the frequency of manual inspection of the connection, improves work efficiency, and reduces the risk of falling due to negligent operation.

• Road/rail freight fixing: It is used in conjunction with chains and tensioners to fix extra-wide and extra-long goods (such as steel, pipes, and engineering equipment) on trucks and container transporters. The eye hook locks the end of the chain through locking, and then tightens the chain through the tensioner to ensure that the goods do not loosen during transportation bumps. 320C is often used for conventional goods in medium and short-distance transportation due to its low cost; 320A is suitable for long-distance and heavy goods (such as wind turbine blades and heavy machinery) to cope with more severe tensile impact. For example: When transporting steel pipes, use 320C eye hooks to connect the two ends of the G70 chain. After locking and clamping the chain, tighten it through the lever tensioner to prevent the steel pipe from rolling and causing the chain to fall off.

• Ocean and inland river transportation: In ship freight, it is used to fix containers and bulk goods (such as ore and wood) on the deck. Due to the humid and violent turbulence in the offshore environment, the eye hook with a lock can prevent the chain from being unhooked due to the impact of waves. At the same time, the corrosion resistance of 320A (partially galvanized) is more suitable for high salt spray environments.

• Hoisting of building components: On construction sites, it is used for tower cranes and truck cranes to hoist steel bars, scaffolding, prefabricated panels and other building materials. The 320A eye hook has strong impact resistance (alloy steel is heat-treated), which can adapt to the open-air environment of the construction site (such as wind, sun, dust), and the locking device can prevent the steel bar bundle and steel pipe from slipping out of the hook during hoisting, especially in high-rise construction, reducing the risk of falling objects.

• Temporary support and traction: In foundation pit support and bridge construction, it is used to connect traction ropes, steel cables and temporary supports (such as anchor rods and steel piles), and transmit tension through the eye hook. The locking design ensures that it will not loosen during dynamic stress (such as soil settlement and support fine-tuning), ensuring the stability of the construction structure.

• Agricultural machinery and material lifting: In farms and forestry farms, it is used with tractors and small cranes to lift agricultural machinery (such as harvester parts, irrigation equipment) or bulk agricultural products (such as bundled straw and logs). 320C is suitable for medium and light lifting in agricultural scenes due to its high cost performance; the locking device can prevent the rope or chain from accidentally falling off when working in muddy and bumpy fields.

• Forestry log transfer: It is used to connect forestry cranes to log bundles to lift and stack logs at logging sites or transfer stations. The locking design can adapt to the slippage of ropes caused by uneven log surfaces, ensuring that the whole bundle of logs does not fall apart during the lifting process.