S-91309A810 5/8"-11 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, reducing the risk of fastener failure.
- Zinc plating provides superior corrosion resistance, extending service life in harsh industrial environments and minimizing maintenance needs.
- Coarse UNC threads with Class 2A fit offer faster installation and easier alignment, saving time and labor costs during assembly.
- Fully threaded design allows for maximum grip and load distribution along the entire length, enhancing joint stability.
- External hex drive and hex head enable high-torque application with standard tools, ensuring secure fastening and easy removal.
- Compliance with ASME B18.2.1 and ASTM A307 standards guarantees consistent quality, dimensional accuracy, and interoperability with other components.
- RoHS 3 compliance ensures environmental safety and meets regulatory requirements for global industrial use.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 5/8"-11 UNC hex head screws are ideal for construction, machinery assembly, and structural frameworks where vibration resistance and durability are critical. The steel material with Rockwell B69 hardness provides excellent wear resistance, while the zinc plating combats rust in humid or outdoor conditions. The coarse thread design prevents cross-threading and ensures quick installation, reducing downtime. Fully threaded for uniform stress distribution, these screws solve common issues like loosening under load, making them a reliable choice for heavy-duty fastening in automotive, manufacturing, and infrastructure projects.
Specification Summary & Compliance
This product adheres to Class 2A thread fit for standard clearance and easy assembly, with precise dimensions per UNC thread standards. Manufactured to meet ASME B18.2.1 and ASTM A307 specifications, it ensures consistent performance and safety. Compliant with RoHS 3 (2015/863/EU) for environmental safety, it is suitable for global industrial applications requiring reliable, standardized fasteners.
