S-91251A762 9/16"-12 x 2 1/2" ASTM A574 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 ensures reliable performance under extreme loads and vibrations
- Superior corrosion resistance from black-oxide coating extends service life in harsh industrial environments
- Precise Class 3A thread fit guarantees secure fastening with minimal play and reduced risk of loosening
- High hardness rating (Rockwell C37) provides excellent wear resistance and maintains thread integrity
- Hex socket drive design allows for high-torque installation in confined spaces without cam-out
- Fully threaded construction offers consistent clamping force along the entire 2-1/2" length
- Industry compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw delivers critical performance where standard fasteners fail. The 9/16"-12 UNC coarse threads provide rapid installation and superior resistance to vibration loosening in heavy machinery, automotive assemblies, and construction equipment. With 170,000 psi tensile strength and Rockwell C37 hardness, it maintains clamp load under dynamic stresses that would compromise ordinary fasteners. The hex drive and socket head profile enable precise torque application in space-constrained applications, while the black-oxide surface treatment offers dependable corrosion protection without compromising dimensional accuracy. These industrial fasteners solve common engineering challenges of joint integrity, installation efficiency, and long-term reliability in demanding environments.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit for precision engagement and UNC coarse thread spacing for optimal performance in most materials. This fully threaded cap screw meets ASTM A574 specification for high-strength requirements and demonstrates compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring both mechanical excellence and regulatory adherence for global industrial applications.
