S-92949A537 1/4"-20 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 tensile strength rated at 70,000 psi, ensuring reliable performance under high-stress applications.
- Precise Class 3A thread fit for secure, vibration-resistant fastening in demanding assemblies.
- Easy installation and removal with a 5/32" hex drive and rounded button head design, reducing tool slippage and assembly time.
- Wide compatibility through 1/4"-20 coarse UNC threads, suitable for various industrial components and materials.
- Consistent durability backed by Rockwell B55 hardness, maintaining structural integrity over repeated use.
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, meeting strict quality and environmental standards.
Professional Applications & Engineering Value
This 18-8 stainless steel rounded head screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The passivated finish enhances its resistance to rust and chemicals, making it suitable for outdoor equipment, marine hardware, and chemical processing plants. With a 1/4"-20 UNC coarse thread and Class 3A fit, it provides a tight, secure connection that minimizes the risk of failure in high-vibration environments like machinery and automotive systems. The hex drive and button head design allow for quick, tool-accessible installation in confined spaces, reducing labor costs and improving workflow in assembly lines. Ideal for OEM and MRO applications, this screw delivers long-term reliability and compliance with industry standards.
Specification Summary & Compliance
This screw features precise dimensions including a 1/2" length, 0.437" head diameter, and Class 3A thread fit per UNC standards. It is manufactured in accordance with ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material quality.
