S-91309A642 3/8"-16 x 4 1/2" 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
- High tensile strength of 60,000 psi ensures reliable performance in demanding industrial applications, reducing the risk of fastener failure.
- Zinc plating finish provides excellent corrosion resistance, extending the service life of the screw in harsh environments.
- Class 2A thread fit with coarse UNC threading allows for quick and easy installation, minimizing assembly time and labor costs.
- Fully threaded design offers consistent grip and clamping force along the entire length, enhancing joint stability.
- External hex drive and hex head enable secure tool engagement and high torque application, preventing stripping and improving efficiency.
- Compliance with ASME B18.2.1 and ASTM A307 standards guarantees dimensional accuracy and material quality, ensuring interoperability and safety.
- Rockwell B69 hardness provides durability and resistance to wear, maintaining integrity under repeated stress.
Professional Applications & Engineering Value
This 3/8"-16 UNC hex head screw is engineered to address common industrial challenges, such as vibration loosening and corrosion in heavy-duty assemblies. Made from steel with a zinc plated finish, it resists environmental degradation, making it ideal for construction, machinery, and automotive applications. The coarse thread spacing and right-hand thread direction facilitate rapid installation in materials like metal and wood, while the external hex drive allows for high-torque tightening without slippage. By meeting rigorous standards like ASME B18.2.1, it ensures precise fit and long-term reliability, reducing maintenance needs and downtime in professional settings.
Specification Summary & Compliance
This product features a Class 2A thread fit with UNC coarse threading, ensuring dimensional accuracy per ASME B18.2.1 and ASTM A307 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and material integrity for global industrial use.
