Heavy Hex Head Design
Larger head dimensions provide higher load distribution and improved wrench engagement for high-torque tightening.
ASME/ANSI B 18.2.1-7 Heavy Hex Screws
- Standard: ASME/ANSI B 18.2.1-7
- Material: Stainless Steel
- Thread Size: 3/8 – 6
- Surface Treatment: Plain, Zinc Plated
- Min Order: 5000pcs
- Sample: Free sample (after quote)
- Delivery time: 30 – 45 Days
Product Overview
Product Application
ASME B18.2.1-7 Heavy Hex Screws are inch-series heavy hexagon head screws specified in ASME B18.2.1 Table 7. They feature a larger hexagonal head compared with standard hex cap screws, providing increased bearing surface and higher torque capability for heavy-duty fastening applications.
Designed for demanding mechanical connections, these screws are widely used in industrial equipment, structural assemblies, machinery, petrochemical applications, and heavy engineering projects where reliable clamping force and durability are required.
Draw
Specification
ASME B18.2.1-7 Heavy Hex Screws vs Standard Hex Cap Screws
Head Size
Heavy hex screws feature a larger head diameter and greater head height, providing better load distribution than standard hex cap screws.
Torque Capacity
The enlarged hex head allows higher tightening torque, making them suitable for heavy-duty fastening applications.
Application Range
Heavy hex screws are preferred for industrial equipment, pressure-related applications, and demanding mechanical structures, while standard hex cap screws are more common for general fastening.
Product Advantages
High Strength Performance
Suitable for applications requiring strong clamping force, vibration resistance, and long-term reliability.
Inch Series Standard
Manufactured according to ASME B18.2.1 Table 7 dimensional requirements, covering sizes from 3/8″ to 6″.
Common Questions
What is ASME B18.2.1-7 Heavy Hex Screw?
It is a heavy hexagon head screw defined in ASME B18.2.1 Table 7 with larger head dimensions for higher torque and heavy-duty fastening applications.
Are ASME B18.2.1-7 screws available in stainless steel?
Yes. Stainless steel versions such as SUS304 and SUS316 can be manufactured for corrosion-resistant applications.
What is the difference between Heavy Hex Screws and Heavy Hex Bolts?
Heavy Hex Screws are typically designed for direct engagement into tapped holes, while Heavy Hex Bolts are generally used with nuts in through-hole assemblies.
Can ASME B18.2.1-7 Heavy Hex Screws be customized?
Yes. Manufacturers can provide customized materials, coatings, lengths, thread specifications, and packaging according to project requirements.
