S-92865A010 1/4"-28 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 capacity with 120,000 psi tensile strength, ideal for high-stress industrial assemblies.
- Superior corrosion resistance through zinc plating, extending service life in harsh environments.
- Reliable fine thread engagement with UNF 1/4"-28 and Class 2A fit, ensuring vibration resistance and secure fastening.
- High-strength Grade 5 steel construction with Rockwell C25 hardness for durability under repeated use.
- Easy installation and removal with external hex drive and standard 7/16" head width for common tools.
- Full threading along the 1 1/4" length provides maximum grip and adjustment flexibility in deep applications.
- Compliance with major industry standards including ASME B18.2.1 and SAE J429, guaranteeing interchangeability and quality.
Professional Applications & Engineering Value
This Grade 5 steel hex head screw is engineered to address critical challenges in heavy machinery, automotive, and structural assemblies where vibration resistance and high tensile demands are paramount. The UNF fine threading (1/4"-28) offers tighter tolerances and improved fatigue resistance compared to coarse threads, reducing the risk of loosening under dynamic loads. The zinc plated finish provides a protective barrier against oxidation and chemical exposure, making it suitable for outdoor or humid environments. Combined with fully threaded design and external hex drive, it ensures rapid installation and consistent clamping force across varied material thicknesses, streamlining production and maintenance workflows.
Specification Summary & Compliance
This fastener adheres to Class 2A thread fit for consistent assembly and meets ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring no restricted substances are used. The screw maintains 120,000 psi tensile strength and Rockwell C25 hardness as per Grade 5 requirements, providing reliable performance in standardized applications.
