S-91309A644 3/8"-16 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
- Exceptional tensile strength of 60,000 psi ensures reliable performance in demanding industrial applications.
- Superior corrosion resistance provided by zinc plating, extending service life in harsh environments.
- High hardness rating (Rockwell B69) offers excellent wear resistance and durability.
- Precise Class 2A thread fit guarantees smooth installation and secure fastening with minimal play.
- External hex drive design allows for high-torque application with standard tools, improving assembly efficiency.
- Coarse UNC threading enables quick engagement and reduced cross-threading risks in various materials.
- Full threading along the 5" length provides maximum grip and adjustability in deep or variable-thickness assemblies.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these 3/8"-16 UNC hex head screws address critical challenges in machinery assembly, structural framing, and equipment manufacturing. The high-strength steel construction combined with zinc plating effectively combats corrosion, making them ideal for environments exposed to moisture or chemicals. The external hex drive and coarse thread design facilitate rapid installation with common tools, reducing labor time while maintaining 60,000 psi tensile strength to withstand high vibrational and dynamic loads. This combination of durability, ease of use, and consistent performance ensures long-term reliability in construction, automotive, and industrial maintenance sectors.
Specification Summary & Compliance
This fully threaded hex head screw features a 3/8"-16 UNC coarse thread with Class 2A fit for precise dimensional accuracy. It is manufactured in compliance with ASME B18.2.1 and ASTM A307 standards, ensuring consistent quality and mechanical properties. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.
