Description and Translation of GB 62 Fasteners
GB 62 fasteners, a fundamental Chinese standard for mechanical components, function as square nuts widely used in general machinery, electrical equipment, and structural assemblies. Their primary role is to form secure threaded connections with bolts or studs, providing stable clamping force to maintain joint integrity under static loads. These nuts are particularly valued for their high torque resistance and ability to prevent rotation during assembly and operation, ensuring reliable fastening in various industrial applications.
In terms of materials, GB 62 fasteners are predominantly manufactured from carbon steel (e.g., Q235 and 45# steel conforming to relevant standards) and low-alloy steel, offering appropriate tensile strength and mechanical stability. For corrosion-prone environments, galvanized carbon steel variants are specified, while stainless steel options (e.g., 304) are available for enhanced rust resistance requirements.
Surface treatments include zinc plating with chromate passivation to improve corrosion resistance, phosphating for better lubrication during installation, and black oxide coating for increased wear resistance and aesthetic appearance. These treatments effectively extend service life and optimize compatibility with diverse operating conditions.
Key characteristics of GB 62 fasteners include standardized metric threads, square profiles with flat bearing surfaces, and precise dimensional tolerances ensuring interchangeability. Their mechanical attributes feature specified proof loads (typically 300-600 MPa depending on material), suitable hardness values, and uniform thread geometry. Additionally, they exhibit stable torque-clamping force relationships and excellent stability when tightened, making them a cost-effective choice for general industrial fastening applications and mechanical manufacturing.
| Thread Size D | M3 | M4 | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | ||||
| P | Pitch | Coarse thread | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | ||
| Fine thread | - | - | - | - | 1 | 1.25 | 1.5 | 1.5 | 1.5 | ||||
| dk | 7 | 8 | 10 | 12 | 15 | 18 | 22 | 26 | 30 | ||||
| ds | 6 | 7 | 8 | 10 | 13 | 15 | 19 | 23 | 26 | ||||
| L | 20 | 24 | 28 | 32 | 40 | 48 | 58 | 64 | 72 | ||||
| k | 8 | 10 | 12 | 14 | 18 | 22 | 27 | 30 | 32 | ||||
| m | 3.5 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 14 | ||||
| y | 1.25 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 | 5 | 6 | ||||
| y1 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 | 5 | 6 | 7 | ||||
| d1 | 3 | 4 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||||
| r | 2 | 2.5 | 3 | 3.5 | 4 | 5 | 6 | 7 | 8 | ||||
| R | 3 | 3.5 | 4.5 | 5 | 6 | 7 | 8.5 | 9 | 10 | ||||
Description and Translation of GB 62 Fasteners
GB 62 fasteners, a fundamental Chinese standard for mechanical components, function as square nuts widely used in general machinery, electrical equipment, and structural assemblies. Their primary role is to form secure threaded connections with bolts or studs, providing stable clamping force to maintain joint integrity under static loads. These nuts are particularly valued for their high torque resistance and ability to prevent rotation during assembly and operation, ensuring reliable fastening in various industrial applications.
In terms of materials, GB 62 fasteners are predominantly manufactured from carbon steel (e.g., Q235 and 45# steel conforming to relevant standards) and low-alloy steel, offering appropriate tensile strength and mechanical stability. For corrosion-prone environments, galvanized carbon steel variants are specified, while stainless steel options (e.g., 304) are available for enhanced rust resistance requirements.
Surface treatments include zinc plating with chromate passivation to improve corrosion resistance, phosphating for better lubrication during installation, and black oxide coating for increased wear resistance and aesthetic appearance. These treatments effectively extend service life and optimize compatibility with diverse operating conditions.
Key characteristics of GB 62 fasteners include standardized metric threads, square profiles with flat bearing surfaces, and precise dimensional tolerances ensuring interchangeability. Their mechanical attributes feature specified proof loads (typically 300-600 MPa depending on material), suitable hardness values, and uniform thread geometry. Additionally, they exhibit stable torque-clamping force relationships and excellent stability when tightened, making them a cost-effective choice for general industrial fastening applications and mechanical manufacturing.
| Thread Size D | M3 | M4 | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | ||||
| P | Pitch | Coarse thread | 0.5 | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | ||
| Fine thread | - | - | - | - | 1 | 1.25 | 1.5 | 1.5 | 1.5 | ||||
| dk | 7 | 8 | 10 | 12 | 15 | 18 | 22 | 26 | 30 | ||||
| ds | 6 | 7 | 8 | 10 | 13 | 15 | 19 | 23 | 26 | ||||
| L | 20 | 24 | 28 | 32 | 40 | 48 | 58 | 64 | 72 | ||||
| k | 8 | 10 | 12 | 14 | 18 | 22 | 27 | 30 | 32 | ||||
| m | 3.5 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 14 | ||||
| y | 1.25 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 | 5 | 6 | ||||
| y1 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 | 5 | 6 | 7 | ||||
| d1 | 3 | 4 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||||
| r | 2 | 2.5 | 3 | 3.5 | 4 | 5 | 6 | 7 | 8 | ||||
| R | 3 | 3.5 | 4.5 | 5 | 6 | 7 | 8.5 | 9 | 10 | ||||
