S-91236A920 1"-8 x 4" 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
- Exceptional tensile strength of 60,000 psi ensures reliable performance in heavy-duty applications and prevents premature failure
- Corrosion-resistant zinc plating provides a durable protective barrier, extending service life in demanding industrial environments
- Coarse UNC thread profile with Class 2A fit enables faster assembly and superior resistance to vibration loosening
- Partially threaded shank design allows for precise clamping force concentration where it's needed most
- External hex drive with large bearing surface delivers high torque capability and prevents tool slippage during installation
- Full compliance with ASME B18.2.1 and ASTM A307 specifications guarantees dimensional accuracy and material quality
- RoHS 3 and REACH environmental compliance ensures safe use across various industrial sectors and global markets
Professional Applications & Engineering Value
This high-strength hex head screw delivers critical engineering value through its zinc plated steel construction and 1"-8 UNC coarse thread design, specifically engineered to solve common industrial fastening challenges. The combination of Rockwell B69 hardness and 60,000 psi tensile strength provides exceptional resistance to shear forces and structural fatigue in heavy machinery, structural steel connections, and equipment manufacturing. The partially threaded configuration ensures optimal stress distribution while the external hex drive accommodates high-torque applications without stripping. These industrial hex screws maintain integrity in vibration-prone environments, making them ideal for construction, manufacturing, and infrastructure projects where reliability cannot be compromised.
Specification Summary & Compliance
This fastener maintains Class 2A thread fit tolerances per UNC standards with precise 1"-8 coarse thread spacing. Manufacturing complies with ASME B18.2.1 dimensional specifications and ASTM A307 material requirements. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance.
