Metric Bolts

Metric bolts are threaded fasteners commonly used in construction, automotive, machinery, furniture, and various other industries. These bolts are measured using the metric system and are identified by a number that starts with “M” (e.g., M6, M8, M10). The number specified in the bolt code indicates the diameter in millimeters, and when used with nuts, they provide secure and durable connections. Metric bolts are essential for ensuring that parts stay firmly together.

Metric bolts are typically made from materials such as steel, stainless steel, brass, aluminum, and plastic. Their surfaces are often coated with zinc, galvanizing, stainless steel, or other special coatings to enhance corrosion resistance. The choice of material and coating depends on the application, strength requirements, and environmental conditions.

Common types of metric bolts include hex head, socket head, flanged, carriage, and eye bolts. Each type is specifically designed for certain applications. For example, flanged bolts offer better resistance to load due to their wide head, while eye bolts are ideal for load-bearing tasks. Metric bolts are manufactured according to international standards, ensuring reliable and consistent fastening solutions for various projects.

Metric Bolt Dimensions and Technical Specifications Table

Feature Option 1 Option 2 Option 3 Option 4
Bolt Type Hex Head Flanged Socket Head Eye Bolt
Metric Size (Diameter) M6 M8 M10 M12
Length (L) 20 mm 30 mm 50 mm 75 mm
Head Height (k) 3.8 mm 5.3 mm 6.4 mm 7.5 mm
Wrench Width (s) 10 mm 13 mm 16 mm 18 mm
Thread Pitch 1.0 mm 1.25 mm 1.5 mm 1.75 mm
Material Steel Stainless Steel Brass Plastic
Coating Zinc Plating Hot Dip Galvanized Epoxy Coating PVC Coating
Corrosion Resistance Medium High Very High Low
Tensile Strength 400 N/mm² 600 N/mm² 800 N/mm² 300 N/mm²
Application Area Construction Automotive Machinery Manufacturing Furniture Production
Durability Class 8.8 10.9 12.9 5.6
Mounting Type Nut Connection Flanged Connection Hex Keyed Ring Connection
Standards DIN 931 ISO 4014 ASTM A325 TS EN ISO 898
Weight (per unit) 0.02 kg 0.03 kg 0.04 kg 0.05 kg
Heat Resistance 200°C 300°C 400°C 100°C
Operating Environment Normal Humid Highly Humid Dry
Additional Features High Strength Vibration Dampening Corrosion Resistant Load Bearing
Color Options Gray Black Chrome White
Conductivity Medium High Low Insulating
Thread Angle 60° 55° 60° 55°
Lifespan Medium Long Very Long Short
This table covers the most common sizes and technical specifications for metric bolts. The size, type, material, and durability class of the bolts may vary depending on the specific application. Metric bolts are widely used across various industries, providing safe and long-lasting fastening solutions for a range of connection needs.

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