S-92949A566 1/4"-28 x 1" 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.
- High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-lasting fastening.
- Precise, secure thread engagement with Class 3A UNF fine threads, ensuring tight, vibration-resistant connections.
- Easy installation and removal using the 5/32" hex drive, providing excellent torque transmission and reduced tool slippage.
- Low-profile, rounded button head design offers a smooth finish that minimizes snagging and improves safety in assembled applications.
- Full threading along the 1" length allows for consistent grip across the entire fastener, enhancing load distribution.
- Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety.
Professional Applications & Engineering Value
This 1/4"-28 UNF Class 3A rounded head screw is engineered to address critical needs in precision assemblies where vibration resistance and corrosion protection are paramount. The 18-8 stainless steel material, combined with a passivated finish, provides excellent durability in moist or chemically aggressive settings, reducing maintenance costs. Its fine UNF threading and Class 3A fit ensure minimal backlash and secure fastening in machinery, electronics, and automotive components. The hex drive and rounded button head facilitate easy access in confined spaces, making it a reliable choice for OEMs and MRO professionals seeking high-performance industrial screws that meet stringent specifications.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit per UNF standards, ensuring precise dimensional accuracy. Manufacturing follows ASME B18.3 specifications, and the product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of restricted hazardous substances and safe for various industrial applications.
