S-92949A597 5/16"-24 x 1/2" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive 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
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional torque transmission through the 3/16" hex drive design, preventing stripping and ensuring secure fastening
- Precise thread engagement with Class 3A UNF fine threading, delivering reliable vibration resistance and reduced loosening
- High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Optimized head profile with rounded button design providing a low-profile, flush finish while maintaining high clamp load
- Full regulatory compliance meeting ASME B18.3 standards, RoHS 3, and REACH for global industrial use
- Complete thread coverage along the 1/2" length ensures maximum grip and load distribution
Professional Applications & Engineering Value
This 5/16"-24 UNF rounded head hex screw delivers critical performance where corrosion resistance and high-strength fastening are paramount. The 18-8 stainless steel material, enhanced by passivated finish, combats oxidation in chemical processing, marine, and food equipment applications. Its Class 3A thread fit and fine thread spacing provide superior resistance to vibrational loosening in machinery and assembly lines. The hex drive ensures efficient installation with standard tools, reducing assembly time while the rounded head minimizes snagging in confined spaces. Engineered to withstand 70,000 psi tensile loads, it reliably secures components in automotive, aerospace, and heavy equipment where failure is not an option.
Specification Summary & Compliance
This fastener maintains Class 3A thread fit per UNF standards with 5/16"-24 fine threading and right-hand direction. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for industrial distribution.
