Stainless Allen Head Bolts are fasteners that combine aesthetics and practicality. Their countersunk hexagonal design provides a secure fastening function while maintaining a smooth and aesthetically pleasing mounting surface. These products offer excellent rust and corrosion resistance, along with good mechanical strength and vibration resistance, ensuring stable and reliable installation and easy maintenance.
Products Description
|
Material |
304 / 316 / 316L |
|
Specification Range |
M4 – M64 |
|
Common specifications |
M6 / M8 / M10 / M12 / M16 / M20 / M24 |
|
Length range |
6 – 300 mm |
|
Thread type |
Metric coarse thread (standard) / Metric fine thread (optional) |
|
Implementation standards |
DIN / ISO / GB / ANSI |
|
Strength grade |
A2-70 / A4-70 / A4-80 |
|
Surface condition |
Natural finish / Polished / Acid pickled and passivated |
|
Manufacturing process |
Cold forging / Machining |
Key Performance
Corrosion Resistance
Corrosion resistance stems from the dense chromium oxide film (passivation layer) formed on the surface. A4 (316) offers significantly better resistance to chloride-containing environments (such as seawater and de-icing salts) than A2 (304).
Mechanical Properties
Stainless allen head bolts possess moderate strength and high ductility, effectively buffering impacts under load. While their mechanical properties are stable, specific mechanical calculations and evaluations are required for extremely high loads or critical structural applications.
Surface Treatment
In addition to the material itself, surface passivation treatment is a standard process used to enhance the integrity and uniformity of the oxide film. Bright polishing and brushing treatments are also available to meet food hygiene or aesthetic requirements.
Application Areas
High Corrosion Resistance Applications
Used in areas directly exposed to corrosive media, such as platform bolts in seawater and chemical reactor flange bolts.
Hygienic and Clean Environments
Used in areas requiring frequent cleaning and prevention of contamination, such as conveyor belt connecting bolts in food production lines and sealing bolts for pharmaceutical tanks.
Aesthetic and Durable Applications
Used in areas that are exposed for long periods and where appearance is important, such as curtain wall fixing bolts for coastal hotels and mounting bolts for high-end outdoor signage.
FAQ
Q: What are the requirements for export packaging?
A: Export packaging must be moisture-proof and contamination-proof, typically using anti-rust paper with vacuum bags or desiccants, and reinforced outer cartons. The outer packaging should clearly indicate the material and specifications and should not be mixed with carbon steel products.
Q: How to choose between 304 and 316 Stainless allen head bolts?
A: Choose according to the corrosive environment: 304 is suitable for general environments; 316 contains molybdenum and is suitable for coastal, seawater, and high-corrosion environments containing chloride ions.
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