S-91274A192 1/4"-20 x 2 1/4" ASME B18.3, ASTM A574, ASTM B117 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 corrosion resistance with zinc-flake coating, ensuring long-term reliability in harsh industrial environments
- High tensile strength of 170,000 psi provides superior load-bearing capacity for demanding applications
- Precise Class 3A thread fit delivers secure, vibration-resistant fastening with minimal play
- Rockwell C37 hardness maintains structural integrity under repeated stress and high torque conditions
- Hex socket drive design allows for easy installation in confined spaces with standard tools
- Compliance with ASME B18.3 and ASTM A574 standards guarantees consistent quality and dimensional accuracy
- RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global supply chains
Professional Applications & Engineering Value
This zinc-flake-coated alloy steel socket head cap screw addresses critical industrial fastening challenges where corrosion resistance and high strength are paramount. The UNC coarse thread with Class 3A fit ensures rapid assembly and reliable performance in vibrating machinery, heavy equipment, and structural frameworks. The partially threaded design concentrates strength where needed while allowing for precise clamping force distribution. Engineered to withstand extreme mechanical stress, these screws prevent joint failure in automotive, aerospace, and manufacturing applications, reducing maintenance downtime and enhancing operational safety. The hex drive socket head facilitates quick installation even in limited-access areas, streamlining production workflows.
Specification Summary & Compliance
This socket head cap screw features a 1/4"-20 UNC coarse thread with Class 3A dimensional tolerance for precise fit. It meets ASME B18.3 and ASTM A574 manufacturing specifications, ensuring consistent thread geometry and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and usage in regulated industries.
