S-92865A353 1/2"-20 x 1 1/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 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 load-bearing capability with 120,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance provided by zinc plating, extending service life in harsh industrial environments
- Precise thread engagement with Class 2A fit UNF fine threads ensuring vibration resistance and secure fastening
- Optimized torque transmission through external hex drive design for efficient installation and removal
- Consistent mechanical properties with Rockwell C25 hardness maintaining dimensional stability under stress
- Full threading coverage along the 1¼" length for maximum grip and load distribution
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 5 hex head screws deliver exceptional performance where reliability is critical. The zinc plated steel construction provides essential corrosion protection for machinery, structural assemblies, and equipment exposed to challenging environments. The 1/2"-20 UNF fine thread pattern with Class 2A fit ensures precise mating with corresponding nuts and tapped holes, minimizing the risk of vibration-induced loosening in dynamic applications. The combination of 120,000 psi tensile strength and Rockwell C25 hardness makes these fully threaded screws ideal for high-stress connections in construction, manufacturing, and automotive industries where consistent clamping force and joint integrity are paramount.
Specification Summary & Compliance
Manufactured to exacting standards with Class 2A thread fit tolerance for precision engagement. Complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features UNF fine threading with right-hand direction and external hex drive configuration per industrial standards.
