S-92949A541 1/4"-20 x 7/8" 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, ensuring long-term reliability in harsh environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for demanding industrial applications
- Precise Class 3A thread fit providing secure fastening with minimal backlash in critical assemblies
- Optimized drive engagement with hex drive design for maximum torque transmission and reduced tool slippage
- Enhanced installation efficiency through UNC coarse threading and fully threaded design for faster assembly
- Compliant with major industry standards including ASME B18.3 for dimensional consistency and performance reliability
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for sustainable procurement
Professional Applications & Engineering Value
These 18-8 stainless steel rounded head screws deliver exceptional performance in demanding industrial environments where corrosion resistance and mechanical integrity are paramount. The passivated finish significantly enhances surface durability against chemical exposure and oxidation, while the Class 3A thread fit ensures precise engagement in critical assemblies. The hex drive configuration provides superior torque transmission for high-tension applications, and the UNC coarse threading facilitates rapid installation in production lines. Ideal for machinery, equipment manufacturing, and structural applications, these fully threaded screws maintain consistent clamping force across the entire fastener length, preventing joint loosening under vibration and dynamic loads.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit tolerance for precision engagement. Features 1/4"-20 UNC coarse threads with right-hand orientation and full threading along the 7/8" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring material safety and regulatory adherence for industrial applications worldwide.
