S-92949A571 1/4"-28 x 1 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 connections in critical assemblies.
- Efficient hex drive design (5/32") allows for high torque application and easy installation with standard tools.
- Fully threaded shank provides maximum grip and uniform load distribution along the entire length.
- Rounded button head profile offers a low-profile, finished appearance while reducing surface snagging.
- Compliance with major standards including ASME B18.3, ensuring consistent quality and interchangeability.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, this 18-8 stainless steel rounded head screw combines material integrity with precision manufacturing to solve common fastening challenges. The passivated finish significantly enhances corrosion resistance, making it suitable for machinery, enclosures, and equipment exposed to moisture or chemicals. Its UNF fine threads and Class 3A thread fit deliver superior clamping force and vibration resistance, preventing loosening in dynamic environments. The hex drive ensures efficient torque transmission during installation, reducing assembly time and improving reliability in high tensile strength scenarios such as automotive, aerospace, and heavy machinery components.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit tolerances per UNF standards, with a 1/4"-28 fine thread and full threading along the 1-1/2" length. It meets ASME B18.3 specifications for dimensional consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use in global markets.
