S-91309A818 5/8"-11 x 6" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws
Low-Strength Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc plating for extended service life in harsh industrial environments
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and stress
- External hex drive design allows for easy installation and removal with standard tools
- Class 2A thread fit provides consistent, reliable engagement while maintaining assembly efficiency
- Fully threaded construction offers maximum grip and holding power along the entire 6" length
- Rockwell B69 hardness rating delivers excellent durability and resistance to wear
- Compliance with ASME B18.2.1/ASTM A307 standards guarantees consistent quality and engineering reliability
Professional Applications & Engineering Value
This heavy-duty hex head screw is engineered to solve critical fastening challenges in demanding industrial applications. The combination of steel construction with zinc plating provides essential corrosion protection for outdoor equipment, structural assemblies, and machinery exposed to environmental elements. The 5/8"-11 UNC coarse thread design ensures rapid installation and superior resistance to vibration loosening, making it ideal for construction, manufacturing, and heavy equipment applications. With full threading along its 6" length and external hex drive, this fastener delivers maximum clamping force and straightforward installation using common tools, reducing assembly time while maintaining structural integrity in critical joints and connections.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with UNC coarse thread specification (5/8"-11) and right-hand thread direction. Manufactured to ASME B18.2.1 dimensional standards and ASTM A307 material specifications, it ensures consistent performance and interchangeability. The product is RoHS 3 (2015/863/EU) compliant, meeting environmental regulations for industrial use. With a tensile strength of 60,000 psi and Rockwell B69 hardness, this fastener delivers reliable mechanical performance for professional applications requiring inch system measurements.
