S-91309A626 3/8"-16 x 1 1/4" 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
- Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments
- Exceptional tensile strength rated at 60,000 psi for reliable performance in high-stress applications
- Precise Class 2A thread fit ensures smooth installation and secure fastening with standard UNC coarse threading
- Full threading design provides maximum grip length and uniform load distribution across the entire fastener
- External hex drive compatibility allows for high-torque installation using common industrial tools
- Rockwell B69 hardness rating maintains structural integrity under repeated mechanical stress
- Comprehensive compliance with ASME B18.2.1, RoHS 3, and REACH standards for quality assurance
Professional Applications & Engineering Value
This 3/8"-16 UNC hex head screw delivers critical engineering solutions for industrial assembly challenges. The steel construction with zinc plating provides essential corrosion protection in manufacturing facilities, outdoor equipment, and mechanical systems where environmental exposure is a concern. The coarse thread spacing and Class 2A thread fit enable rapid installation while preventing cross-threading in high-volume production environments. With fully threaded design and external hex drive, this fastener offers superior clamping force distribution and accessibility in confined spaces. These hex head screws are engineered to maintain joint integrity in structural applications, machinery assembly, and heavy equipment where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
This fastener maintains precise Class 2A thread fit tolerances according to UNC thread standards with coarse thread spacing. Manufacturing specifications comply with ASME B18.2.1 where identified under ASTM A307. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant (as of 06/14/2023 for 235 SVHC), ensuring environmental responsibility and regulatory adherence for global industrial applications.
