S-94967A352 1/4"-20 x 1/2" ASME B18.2.1, ASTM B117, 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 for reliable performance in high-stress applications
- Superior corrosion protection through black corrosion-resistant coating extends service life in harsh environments
- Optimized thread engagement with UNC coarse threads and Class 2A fit ensures secure fastening and vibration resistance
- Enhanced durability from Rockwell C25 hardness provides excellent wear resistance and repeated use capability
- Full threading design allows maximum grip length and uniform stress distribution along the entire fastener
- Industry-standard compliance with ASME, ASTM, and SAE specifications guarantees consistent quality and interoperability
- Environmental responsibility through RoHS 3 and REACH compliance meets modern regulatory requirements
Professional Applications & Engineering Value
These Grade 5 hex head screws deliver critical performance advantages for industrial applications where corrosion resistance and high tensile strength are paramount. The black corrosion-resistant coated steel construction protects against environmental degradation in outdoor equipment, machinery, and structural assemblies. With UNC coarse threading and external hex drive, these fasteners provide superior grip and easy installation using standard tools, reducing assembly time while maintaining Class 2A thread fit precision. The combination of 120,000 psi tensile strength and fully threaded design ensures uniform load distribution, making them ideal for heavy-duty applications in construction, automotive, and manufacturing sectors where vibration resistance and long-term reliability are essential.
Specification Summary & Compliance
This 1/4"-20 x 1/2" hex head screw features UNC coarse threads with Class 2A thread fit tolerance for precise engagement. Manufactured to ASME B18.2.1 dimensional standards with material properties meeting SAE J429 Grade 5 requirements. Corrosion resistance validated per ASTM B117 testing. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets.
