S-91251A116 3/8"-16 x 7" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket 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 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish extends service life in harsh industrial environments, minimizing maintenance needs.
- Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and reducing loosening over time.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use and installation.
- Coarse UNRC threads allow for quicker installation and better performance in materials where fine threads may strip or fail.
- Partially threaded design enables precise clamping force control, ideal for applications requiring specific grip lengths.
- Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and suitability for regulated industries.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these socket head cap screws address critical challenges in machinery, automotive, and heavy equipment assembly. The black-oxide alloy steel construction combats corrosion and wear, while the coarse thread (3/8"-16) and Class 3A fit provide superior grip in soft materials or high-vibration settings, preventing joint failure. The hex drive (5/16") allows for high-torque installation with standard tools, ensuring tight, reliable fastening in confined spaces. Ideal for partially threaded needs, they offer precise load distribution, reducing stress concentrations and extending component life in high-strength environments.
Specification Summary & Compliance
This screw features a 3/8"-16 coarse UNRC thread with Class 3A thread fit for precise tolerances, and a minimum thread length of 1 1/4". It complies with ASTM A574 specifications for high-strength alloy steel, ensuring consistent mechanical properties. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety standards for industrial use.
