S-92949A074 2-56 x 1/8" 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 for extended service life in harsh environments
- Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, high-stress applications
- Precise Class 3A thread fit ensures secure fastening with minimal backlash and consistent performance in assembly operations
- Hex drive design provides superior torque transmission and reduces the risk of tool slippage during installation
- Fully threaded coarse UNC pattern enables faster installation and stronger holding power in various materials
- Compact rounded button head offers a low-profile finish that minimizes snagging while maintaining a professional appearance
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for guaranteed quality and environmental safety
Professional Applications & Engineering Value
This 2-56 UNC rounded head screw delivers critical engineering solutions where space constraints and corrosion resistance are paramount. The 18-8 stainless steel material, enhanced by passivated finish, provides excellent protection against oxidation and chemical exposure, making it ideal for electronics, precision instruments, and marine applications. The hex drive and coarse thread design ensure rapid, secure assembly in automated production environments, reducing installation time and preventing cross-threading. With its fully threaded construction and Class 3A thread fit, this fastener maintains consistent clamping force in vibration-prone assemblies, addressing common failure points in industrial equipment and consumer devices.
Specification Summary & Compliance
This screw maintains Class 3A thread fit per UNC standards with a diameter of 0.086" and coarse thread spacing. Manufacturing follows ASME B18.3 specifications, ensuring dimensional accuracy and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and supporting sustainable procurement practices.
