Products
Blue-White Zinc Screw
Blue-White Zinc Screw (alias: Blue-White Zinc Set Screw, Color Zinc Machine Screw) is a fastener made of carbon steel (base material) with blue-white zinc (color zinc) electroplating on the surface. It is mainly used for part fixation and anti-loosening in machinery, furniture, building materials, and other fields. Its surface presents a uniform blue-white color, combining decorativeness and practicality:
Anti-Corrosion: The blue-white zinc layer effectively isolates air, moisture, and mild corrosive media (e.g., water vapor in humid environments, weak acids/alkalis), preventing the carbon steel base from rusting. Suitable for humid or mildly corrosive environments;
High Strength: The carbon steel material (common grades: 4.8, 8.8) maintains good mechanical properties (e.g., Grade 8.8 has a tensile strength ≥800MPa), suitable for occasions requiring a certain load-bearing capacity;
Structural Design: Mostly adopts a hexagon socket drive design (compliant with ISO 4762 standard), convenient for tightening with wrenches, electric screwdrivers, and other tools; the thread is a metric standard (e.g., M8×1.25), with a regular tooth profile and small fit clearance (IT6 grade precision), ensuring reliable fixation.
Product Description
Blue-White Zinc Screw (alias: Blue-White Zinc Set Screw, Color Zinc Machine Screw) is a fastener made of carbon steel (base material) with blue-white zinc (color zinc) electroplating on the surface. It is mainly used for part fixation and anti-loosening in machinery, furniture, building materials, and other fields. Its surface presents a uniform blue-white color, combining decorativeness and practicality:
Anti-Corrosion: The blue-white zinc layer effectively isolates air, moisture, and mild corrosive media (e.g., water vapor in humid environments, weak acids/alkalis), preventing the carbon steel base from rusting. Suitable for humid or mildly corrosive environments;
High Strength: The carbon steel material (common grades: 4.8, 8.8) maintains good mechanical properties (e.g., Grade 8.8 has a tensile strength ≥800MPa), suitable for occasions requiring a certain load-bearing capacity;
Structural Design: Mostly adopts a hexagon socket drive design (compliant with ISO 4762 standard), convenient for tightening with wrenches, electric screwdrivers, and other tools; the thread is a metric standard (e.g., M8×1.25), with a regular tooth profile and small fit clearance (IT6 grade precision), ensuring reliable fixation.
Anti-Corrosion: The blue-white zinc layer effectively isolates air, moisture, and mild corrosive media (e.g., water vapor in humid environments, weak acids/alkalis), preventing the carbon steel base from rusting. Suitable for humid or mildly corrosive environments;
High Strength: The carbon steel material (common grades: 4.8, 8.8) maintains good mechanical properties (e.g., Grade 8.8 has a tensile strength ≥800MPa), suitable for occasions requiring a certain load-bearing capacity;
Structural Design: Mostly adopts a hexagon socket drive design (compliant with ISO 4762 standard), convenient for tightening with wrenches, electric screwdrivers, and other tools; the thread is a metric standard (e.g., M8×1.25), with a regular tooth profile and small fit clearance (IT6 grade precision), ensuring reliable fixation.
Product Parameter
The following are common metric specifications (non-standard customization is available, e.g., adjusting length, thread parameters):
Note: Specification is expressed as "Nominal Thread Diameter×Length" (e.g., M8×20 means nominal thread diameter 8mm, length 20mm); the blue-white zinc layer thickness is usually 5-15μm (micrometers), adjustable according to anti-corrosion requirements.
| Nominal Thread Diameter (M) | Nominal Length (mm) | Pitch (mm) | Hexagon Socket Size (mm) | Example Specifications |
| M3 | 6-30 | 0.5 | 2.5 | M3×12, M3×20 |
| M4 | 8-40 | 0.7 | 3.0 | M4×16, M4×25 |
| M5 | 10-50 | 0.8 | 4.0 | M5×20, M5×30 |
| M6 | 12-60 | 1.0 | 5.0 | M6×25, M6×35 |
| M8 | 16-80 | 1.25 | 6.0 | M8×20, M8×30 |
| M10 | 20-100 | 1.5 | 8.0 | M10×30, M10×50 |
| M12 | 25-120 | 1.75 | 10.0 | M12×40, M12×60 |
Note: Specification is expressed as "Nominal Thread Diameter×Length" (e.g., M8×20 means nominal thread diameter 8mm, length 20mm); the blue-white zinc layer thickness is usually 5-15μm (micrometers), adjustable according to anti-corrosion requirements.
Product Feature
Excellent Anti-Corrosion Performance: The blue-white zinc layer acts as a physical barrier, effectively preventing the carbon steel base from rusting. It is suitable for humid environments (e.g., bathrooms, kitchens) or mildly corrosive occasions (e.g., weak acids/alkalis in food processing workshops), with a service life 2-3 times longer than ordinary black zinc screws.
Aesthetically Pleasing Appearance: The blue-white color is uniform and bright, suitable for fields with high requirements for product appearance (e.g., home decoration, communication equipment, consumer electronics), avoiding the monotony of black zinc screws.
High Strength & High Cost-Effectiveness: The strength of carbon steel (e.g., Grade 8.8 tensile strength ≥800MPa) is much higher than that of aluminum alloy, and the cost of blue-white zinc treatment is lower than that of stainless steel electroplating. It is suitable for occasions requiring strength without high costs (e.g., industrial building materials, vehicle & ship parts).
Convenient Installation: The hexagon socket design complies with the ISO 4762 international standard, with strong versatility of tools (wrenches, electric screwdrivers). The torque transmission efficiency is high during tightening (maximum torque can reach 10N·m), and it is not easy to slip, suitable for occasions with frequent disassembly and assembly (e.g., equipment maintenance, furniture adjustment).
Environmental Compliance: The blue-white zinc treatment uses a cyanide-free plating process (compliant with ROHS, REACH standards), with no harmful substances leaching out, suitable for fields with strict environmental requirements (e.g., food, medical).
Application Fields
Home Decoration: Used for assembling furniture (e.g., sofas, wardrobes, bookshelves) to fix connectors (e.g., hinges, slides, shelf brackets). The blue-white zinc appearance coordinates with home styles, and the anti-corrosion performance is suitable for humid environments (e.g., bathroom furniture).
Industrial Building Materials: Used for connections in steel structure buildings, scaffolding, and railway facilities. Grade 8.8 strength can bear heavy loads, and the blue-white zinc layer prevents outdoor rusting, extending service life.
Medical Equipment: Used for fixing parts of medical devices (e.g., operating tables, imaging equipment, rehabilitation devices). Cyanide-free plating complies with medical hygiene requirements (no harmful substances leaching out), and the appearance is neat.
Food Industry: Used for assembling food processing machinery (e.g., packaging machines, conveyor lines, mixers). The blue-white zinc layer is resistant to weak acids and alkalis (e.g., acetic acid, citric acid in food), easy to clean (smooth surface with no dead corners), and complies with GB 14930.1 "Food Safety National Standard General Safety Requirements for Food Contact Materials and Products".
Vehicle & Ship Parts: Used for fixing engine components (e.g., cylinder heads, camshafts) and chassis parts (e.g., suspension brackets, drive shafts) in automobiles/ships. Grade 8.8 strength can withstand vibration and impact, and the blue-white zinc layer prevents high temperature and corrosion in engine compartments.
Communications Industry: Used for fixing internal parts of communication equipment (e.g., base stations, switches, routers). The blue-white zinc appearance does not affect the aesthetics of the equipment, and the anti-corrosion performance is suitable for the humid environment in computer rooms (e.g., water vapor in air-conditioned rooms).
Aesthetically Pleasing Appearance: The blue-white color is uniform and bright, suitable for fields with high requirements for product appearance (e.g., home decoration, communication equipment, consumer electronics), avoiding the monotony of black zinc screws.
High Strength & High Cost-Effectiveness: The strength of carbon steel (e.g., Grade 8.8 tensile strength ≥800MPa) is much higher than that of aluminum alloy, and the cost of blue-white zinc treatment is lower than that of stainless steel electroplating. It is suitable for occasions requiring strength without high costs (e.g., industrial building materials, vehicle & ship parts).
Convenient Installation: The hexagon socket design complies with the ISO 4762 international standard, with strong versatility of tools (wrenches, electric screwdrivers). The torque transmission efficiency is high during tightening (maximum torque can reach 10N·m), and it is not easy to slip, suitable for occasions with frequent disassembly and assembly (e.g., equipment maintenance, furniture adjustment).
Environmental Compliance: The blue-white zinc treatment uses a cyanide-free plating process (compliant with ROHS, REACH standards), with no harmful substances leaching out, suitable for fields with strict environmental requirements (e.g., food, medical).
Application Fields
Home Decoration: Used for assembling furniture (e.g., sofas, wardrobes, bookshelves) to fix connectors (e.g., hinges, slides, shelf brackets). The blue-white zinc appearance coordinates with home styles, and the anti-corrosion performance is suitable for humid environments (e.g., bathroom furniture).
Industrial Building Materials: Used for connections in steel structure buildings, scaffolding, and railway facilities. Grade 8.8 strength can bear heavy loads, and the blue-white zinc layer prevents outdoor rusting, extending service life.
Medical Equipment: Used for fixing parts of medical devices (e.g., operating tables, imaging equipment, rehabilitation devices). Cyanide-free plating complies with medical hygiene requirements (no harmful substances leaching out), and the appearance is neat.
Food Industry: Used for assembling food processing machinery (e.g., packaging machines, conveyor lines, mixers). The blue-white zinc layer is resistant to weak acids and alkalis (e.g., acetic acid, citric acid in food), easy to clean (smooth surface with no dead corners), and complies with GB 14930.1 "Food Safety National Standard General Safety Requirements for Food Contact Materials and Products".
Vehicle & Ship Parts: Used for fixing engine components (e.g., cylinder heads, camshafts) and chassis parts (e.g., suspension brackets, drive shafts) in automobiles/ships. Grade 8.8 strength can withstand vibration and impact, and the blue-white zinc layer prevents high temperature and corrosion in engine compartments.
Communications Industry: Used for fixing internal parts of communication equipment (e.g., base stations, switches, routers). The blue-white zinc appearance does not affect the aesthetics of the equipment, and the anti-corrosion performance is suitable for the humid environment in computer rooms (e.g., water vapor in air-conditioned rooms).
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