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GB5785 Fine Pitch Hexagon Head Bolts

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GB5785 Fine Pitch Hexagon Head Bolts are precision-engineered fasteners featuring a hexagonal head and fine thread pitch, optimized for applications requiring high clamping force, vibration resistance, and dimensional accuracy. The fine pitch design (e.g., smaller thread spacing compared to standard coarse threads) allows for finer adjustments and improved load distribution, making these bolts ideal for assemblies subjected to dynamic stresses. Their geometry adheres to strict tolerance standards, ensuring compatibility with threaded holes in high-precision components.

In the automotive sector, GB5785 bolts are extensively employed in critical systems such as engine mounts, gearbox housings, and chassis components. The fine threads enhance fatigue resistance under cyclic loads, a common challenge in vehicle operation, while the hex head design enables secure tool engagement for controlled torque application. This is vital in automotive manufacturing, where consistent fastener performance directly impacts safety and longevity.

Key Advantages for Your Applications:

  • Exceptional Clamping Force: Ensures secure and robust connections in critical automotive systems.
  • Superior Vibration Resistance: Prevents loosening under the dynamic stresses of vehicle operation.
  • Precise Dimensional Accuracy: Guarantees compatibility with high-precision automotive components.
  • Enhanced Fatigue Resistance: The fine thread design improves the lifespan of the joint under cyclic loads.
  • Secure Tool Engagement: The hex head allows for controlled torque application, vital for safety-critical assemblies.
  • Finer Adjustment Capability: Enables precise tightening and optimal clamping force.
  • Improved Load Distribution: Enhances the overall strength and reliability of the fastened joint.

Ideal for:

  • Engine Mounts: Providing secure and vibration-resistant fastening for engine assemblies.
  • Gearbox Housings: Ensuring tight and reliable sealing and structural integrity.
  • Chassis Components: Securing critical suspension, steering, and structural elements.
  • High-Precision Automotive Assemblies: Where dimensional accuracy and precise torque are paramount.
  • Applications Subject to Cyclic Loads: Enhancing fatigue resistance in dynamically stressed joints.
  • Automotive Manufacturing Assembly Lines: Ensuring consistent and reliable fastening for safety-critical components.
  • Heavy-Duty Automotive Applications: Requiring high clamping force and resistance to loosening.



Product Name Standard Material Diameter (Thread Size) Length
Hexagon Head Bolt GB/T 5782-2016 Carbon Steel, Grade 8.8 M5 16 mm
Hexagon Head Bolt GB/T 5782-2016 Carbon Steel, Galvanized M6 20 mm
Hexagon Head Bolt GB/T 5782-2016 Stainless Steel A2-70 M8 25 mm
Hexagon Head Bolt GB/T 5782-2016 Alloy Steel, Grade 10.9 M10 30-100 mm
Hexagon Head Bolt GB/T 5782-2016 Carbon Steel, Black Oxide M12 40-120 mm
Hexagon Head Bolt ASME B18.2.1 ASTM A307, Grade B 1/4" 1" (25.4 mm)
Hexagon Head Bolt ASME B18.2.1 ASTM A325, Type 1 5/16" 1.5" (38 mm)
Hexagon Head Bolt ASME B18.2.1 ASTM A193 B7 3/8" 2" (50.8 mm)
Hexagon Head Bolt ASME B18.2.1 Stainless Steel 316 1/2" 3" (76.2 mm)
Hexagon Head Bolt DIN 931 C45 Steel, Galvanized M6 20-200 mm
Hexagon Head Bolt DIN 933 8.8 Steel, Plain M8 25-200 mm
Hexagon Head Bolt ISO 4014 Steel, Grade 8.8 M10 30-300 mm
Hexagon Head Bolt ISO 4017 Stainless Steel A4-80 M12 40-300 mm
Hexagon Head Bolt JIS B 1180 SCM435 Alloy Steel M6 20-150 mm
Hexagon Head Bolt JIS B 1180 SUS304 Stainless Steel M8 25-150 mm
Hexagon Head Bolt ANSI B18.2.3.6M ASTM A490, Galvanized M16 50-300 mm
Hexagon Head Bolt BS 3692 EN 14399-4 Grade 10.9 M20 60-300 mm
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About Us
Zhejiang Zhongrui Auto Parts Co., Ltd.
Zhejiang Zhongrui Auto Parts Co., Ltd.
As China Automotive GB5785 Fine Pitch Hexagon Head Bolts Suppliers and Custom GB5785 Fine Pitch Hexagon Head Bolts Factory.
Zhejiang Zhongrui Auto Parts Co., Ltd. was founded in 1986. The original unit is located in Ruian City, one of the birthplaces of Wenzhou's economic model, and is located in Tangxia, the "Auto Parts Capital of China". In 2004, in order to further expand its production scale, the company The industrial park in Jiaxing City, Zhejiang, which is located in a very advantageous location, acquired new land and built a modern production plant and office building. The company covers an area of ​​36,237 square meters, with a factory area of ​​20,000 square meters. The company's fixed assets are 130 million yuan.
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