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China Galvanized Hexagon Head Combination Bolts Factory - Durable Suppliers for Construction and Mechanical Equipment
| Thread Specifications d |
M3 | M4 | M5 | M6 | M8 | M10 | M12 | |
| a | Max | 1 | 1.4 | 1.6 | 2 | 2.5 | 3 | 3.5 |
| H | Max | 2 | 2.75 | 3.25 | 4 | 5 | 6.25 | 7.5 |
| dc | Reference value | 5.23 | 6.78 | 8.75 | 10.71 | 13.64 | 16.59 | 19.53 |
Main Applications of the Outer Hexagonal Screw with Spring Cushion Combination Screw
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🔩Fixed ConnectionThe outer hexagonal screw is used for fixing the connection of two or more parts, widely used in electronics, electrical appliances, electrical power, furniture, chemical, water conservancy, ships and other industrial equipment and devices.
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🛡️Shock Absorption and MitigationCushion as an elastic component can effectively reduce vibration and impact, helping to avoid vibration and loose screws.
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🔒Prevent LooseningIn the case of vibration, the elastic cushion can make the screws more stable and reduce the risk of looseness.
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↔️Adjust the GapWhen the gap between the screw and the part needs to be adjusted, the spring pad can play the role of gap adjustment.
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🔇Reduce NoiseThe spring pad can reduce the vibration of the connector, reduce the noise, and improve the comfort of use.
The hexagonal outer screw belt cushion combination screw is widely used in the industrial field, especially in machining, assembly and maintenance. They can help workers to complete tasks more easily, and are increasingly favored by consumers.
Frequently Asked Questions
QWhat is a hexagonal screw with spring cushion combination bolt?
A hexagonal screw with spring cushion combination bolt is a pre-assembled unit that integrates a hex bolt, a spring washer, and a flat washer into a single component. This design ensures correct washer placement every time and simplifies assembly in industrial applications.
QWhat thread sizes are available for this combination bolt?
These combination bolts are available in standard metric sizes: M3, M4, M5, M6, M8, M10, and M12, covering a broad range of light to medium-duty industrial fastening requirements.
QWhy is galvanized coating applied to these combination bolts?
Galvanizing applies a zinc layer to the steel bolt, protecting it from rust and corrosion. This makes galvanized hexagon head combination bolts well-suited for outdoor environments, humid conditions, or settings with chemical exposure where uncoated steel would degrade quickly.
QHow does the spring washer prevent the bolt from loosening?
The spring washer acts as an elastic element that maintains clamping tension even under vibration. Its split, coiled design bites into the bolt head and workpiece surface, creating mechanical friction that resists rotation and prevents the bolt from loosening over time.
QIn which industries are these combination bolts most commonly used?
These bolts are widely used across electronics, electrical appliances, power generation equipment, furniture manufacturing, chemical processing, hydraulic and water conservancy systems, and shipbuilding — any application where secure, vibration-resistant fastening is required.
QWhat is the advantage of a combination bolt over buying bolt, washer, and spring washer separately?
Combination bolts reduce assembly time, eliminate the risk of missing or mis-ordering components, and simplify inventory management. By replacing three separate parts with a single pre-assembled unit, they improve production line efficiency and lower the overall cost of assembly operations.