S-91236A603 5/16"-18 x 5" 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 tensile strength of 60,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Zinc plating provides excellent corrosion resistance, extending the service life of the screw in harsh industrial environments.
- Coarse UNC threads with Class 2A fit offer faster assembly and better vibration resistance compared to fine threads.
- Partially threaded design allows for precise clamping force control, ideal for applications requiring specific grip ranges.
- External hex drive and hex head enable easy installation and removal with standard tools, improving maintenance efficiency.
- Rockwell B69 hardness ensures high durability and resistance to wear, maintaining thread integrity over repeated use.
- Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This 5/16"-18 UNC hex head screw is engineered to address common industrial fastening challenges, such as vibration loosening and corrosion-induced failure. Made from steel with zinc plating, it provides a robust barrier against moisture and chemicals, making it suitable for outdoor machinery, construction frameworks, and automotive assemblies. The coarse thread design ensures quick installation and reliable holding power in materials like wood and metal, while the partial threading allows for optimal clamp load distribution. Ideal for heavy-duty applications requiring consistent performance, this screw minimizes maintenance downtime and enhances structural integrity in demanding environments.
Specification Summary & Compliance
This screw features precise Class 2A thread fit per UNC standards, ensuring consistent engagement and tolerance. It meets ASME B18.2.1 specifications under ASTM A307 for dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it adheres to environmental and safety regulations, supporting sustainable procurement practices.
