S-91274A176 1/4"-20 x 1 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 tensile strength of 170,000 psi provides superior load-bearing capacity for demanding industrial applications
- Premium zinc-flake coating offers outstanding corrosion resistance, extending service life in harsh environments
- Class 3A thread fit ensures precise engagement and reliable fastening performance in critical assemblies
- Rockwell C37 hardness delivers excellent wear resistance and durability against repeated stress
- Hex socket drive design allows for high torque application and secure installation in confined spaces
- Full compliance with ASME B18.3 standards guarantees dimensional accuracy and interchangeability
- RoHS 3 and REACH compliance ensures environmental responsibility and regulatory acceptance
Professional Applications & Engineering Value
This high-strength socket head cap screw is engineered to solve critical fastening challenges in industrial machinery, automotive systems, and heavy equipment applications. The zinc-flake-coated alloy steel construction provides exceptional corrosion resistance while maintaining the structural integrity needed for high-vibration environments. The 1/4"-20 UNC coarse threads with Class 3A fit ensure rapid assembly and reliable performance in applications requiring repeated disassembly. The combination of 170,000 psi tensile strength and Rockwell C37 hardness makes these socket head cap screws ideal for applications where fastener failure is not an option, providing engineers with a reliable solution for critical joints and structural connections.
Specification Summary & Compliance
This socket head cap screw features precision 1/4"-20 UNC coarse threads with Class 3A thread fit for superior engagement and dimensional accuracy. Manufactured in compliance with ASME B18.3 specifications and material standards ASTM A574 and ASTM B117 for corrosion testing. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
