Galvanized B18.15 Lifting Ring Screw Ring Nut Lifting Ring Various Specifications Spot Wholesale

"A combination screw is actually a type of screw, with only a special feature. It is usually a three or two combination component, but at least a two combination component can be called a combination screw. The main difference between ordinary screws and ordinary screws is that they are equipped with an additional spring washer or a flat washer compared to ordinary screws. In the case of three combinations, there is an additional spring washer. This is the main difference in appearance between combination screws and regular screws. In addition to the obvious difference in appearance, the main difference between combination screws and ordinary screws is their mechanical properties and usage. A combination screw is a three component or two component with an elastic flat washer, of course, it is made of ordinary screws with elastic flat washers. If you put on the flat cushion, it won't come off. Tightened into a combination. In terms of mechanical performance, a combination screw is composed of three accessories, and in terms of performance, it definitely requires three fasteners to work together. The mechanical properties of the combined screws are more secure when used. More convenient, the biggest advantage of combining screws is that it can make the production line operation convenient and fast, improving work efficiency. The main difference between the use of combination screws and ordinary screws lies in their versatility. Ordinary screws have a wider range of uses than combination screws, and almost all industrial products use ordinary screws. Combination screws are also useful! It is only available on specific product materials. When a screw needs to be used in conjunction with a spring washer and a flat washer, a combination screw can be used"" 1) This standard specifies the dimensions, technical requirements, acceptance rules, and measurement methods of locking nuts (referred to as nuts) and locking devices. This standard applies to the design, production, inspection, and user acceptance of nuts and locking devices for conical bushings. 2) The terminology used in this standard complies with the provisions of GB/T 6930. This standard specifies the marking system, indicators, test methods, and markings for the mechanical and working performance of effective torque steel hexagonal lock nuts. This standard is applicable to coarse tooth grade 6H nuts manufactured from carbon steel or alloy steel, with a width across the edge in accordance with GB 3104, a nominal height of ≥ 0.8D, and a requirement for guaranteed load and effective torque, with a thread diameter of 3-39mm. Except for the effective torque part, the thread dimensions and tolerances shall comply with the provisions of GB 193, GB 196, and GB 197. The working temperature range of nuts should comply with: all metal nuts without electroplating treatment: -50 ℃~+300 ℃. All metal nuts treated with electroplating: -50 ℃~+230 ℃; Nut embedded with non-metallic components: -50 ℃ to+120 ℃. This standard does not apply to nuts with special performance requirements (such as welding performance and corrosion resistance). For fine tooth lock nuts or thin nuts made of stainless steel, non-ferrous metals, carbon steel or alloy steel, the performance indicators and test methods for effective torque specified in this standard can be adopted through mutual agreement" A self-locking nut is a type of nut that can lock itself by friction. Generally, nuts will loosen themselves due to vibration and other reasons during use. To prevent this phenomenon, self-locking nuts were invented. The main function of self-locking nuts is to prevent loosening and vibration. For special occasions. Its working principle is generally self-locking by friction. The types of self-locking nuts classified by function include those with embedded nylon rings, those with neck closures, and those with metal anti loosening devices. They all belong to the effective torque type locking nuts (refer to the national standard GB/T3098.9-2002). At present, the traditional convex washers on the market have unreasonable design, complex structure, and inconvenient installation, disassembly, and use. After long-term use, they are prone to fracture and deformation due to poor toughness, resulting in a short service life that requires regular shutdown and maintenance, which affects the efficiency and safety of equipment assembly. At the same time, their wear resistance, corrosion resistance, and high temperature resistance are also poor. Regular replacement and maintenance also increase the economic cost of production for users, So the convex washers of the existing structure can no longer meet the high standard usage requirements of existing mechanical assembly auxiliary parts, which is currently an urgent problem to be solved.