S-91274A200 1/4"-20 x 2 3/4" 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, ideal for harsh industrial environments
- Superior load-bearing capacity from 170,000 psi tensile strength for critical structural applications
- Precise thread engagement with Class 3A fit ensuring reliable, vibration-resistant connections
- Enhanced durability from Rockwell C37 hardness providing excellent wear resistance
- Easy installation and removal with standard hex socket drive and right-hand UNC coarse threads
- Industry compliance assurance meeting ASME B18.3 and ASTM A574 manufacturing standards
- Environmental regulation compliance with RoHS 3 and REACH for global supply chain suitability
Professional Applications & Engineering Value
This zinc-flake-coated alloy steel socket head cap screw delivers exceptional performance in demanding industrial settings where corrosion resistance and high tensile strength are paramount. The UNC coarse thread design with Class 3A thread fit ensures rapid assembly and secure fastening in machinery, equipment manufacturing, and structural applications. The partially threaded configuration provides optimal clamping force distribution while the hex socket drive allows for high-torque installation in confined spaces. Engineered to withstand extreme mechanical stress and environmental exposure, these socket head cap screws prevent thread stripping and maintain integrity under vibration, making them ideal for automotive, aerospace, and heavy equipment applications where reliability is non-negotiable.
Specification Summary & Compliance
Manufactured to ASME B18.3 and ASTM A574 specifications with Class 3A thread fit precision. Features 1/4"-20 UNC coarse threads with minimum 1" thread length and 2-3/4" overall length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Zinc-flake coating provides superior corrosion protection per ASTM B117 testing standards.
