S-92865A250 1/4"-20 x 4 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
- Enhanced load-bearing capacity with Grade 5 steel construction and 120,000 psi tensile strength for reliable performance in high-stress environments.
- Superior corrosion resistance through zinc plating, extending service life in humid or outdoor industrial settings.
- Optimized thread engagement with UNC coarse threading and Class 2A fit, ensuring quick assembly and reduced cross-threading risks.
- High torque application suitability due to the external hex drive and Rockwell C25 hardness, preventing stripping under heavy use.
- Versatile partial threading design allowing secure clamping across varied material thicknesses without compromising grip strength.
- Regulatory peace of mind with compliance to ASME B18.2.1, RoHS 3, and REACH, meeting stringent industrial and environmental standards.
- Durable inch-system sizing (1/4"-20 thread and 4 1/4" length) for compatibility with North American machinery and equipment designs.
Professional Applications & Engineering Value
Engineered for demanding sectors, this Grade 5 steel hex head screw addresses critical fastening challenges in industrial machinery, automotive assemblies, and construction frameworks. The zinc-plated finish combats rust in corrosive environments, while the UNC coarse threads provide rapid installation and vibration resistance. With a partially threaded shank, it ensures precise clamping force distribution, preventing joint loosening under dynamic loads. The external hex drive facilitates high-torque tightening with standard tools, reducing assembly time and maintenance costs. Ideal for applications requiring ASME B18.2.1 compliance, it delivers consistent performance in heavy-duty fastening systems where reliability is non-negotiable.
Specification Summary & Compliance
This screw adheres to Class 2A thread fit tolerances and UNC coarse thread standards, ensuring dimensional accuracy for inch-based applications. Manufacturing follows ASME B18.2.1 specifications (referencing SAE J429 for Grade 5 mechanical properties), with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material restrictions adherence.
