S-92949A841 1/4"-28 x 7/16" ASME B18.3, ASTM F879 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
- Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
- Superior load-bearing capability thanks to a high 70,000 psi tensile strength, ensuring reliable performance under stress.
- Precise and secure fastening achieved with a Class 3A thread fit and UNF fine thread, minimizing the risk of loosening.
- Easy installation and removal facilitated by the hex drive design, allowing for high torque application with standard tools.
- Durable and long-lasting performance supported by Rockwell B55 hardness, resisting wear and deformation.
- Full thread engagement along the entire 7/16" length provides maximum grip and holding power in assemblies.
- Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This 1/4"-28 UNF rounded head screw is engineered to address common challenges in precision assemblies requiring high strength and corrosion resistance. The 18-8 stainless steel material, combined with a passivated finish, provides excellent protection against rust and chemical exposure, making it suitable for applications in marine, chemical processing, and food equipment industries. The fine thread (UNF) and Class 3A thread fit ensure tight, vibration-resistant connections, critical in machinery and automotive components where loosening can lead to failure. The hex drive and button head style allow for flush mounting and easy access in confined spaces, enhancing assembly efficiency and reliability in heavy-duty fastening scenarios.
Specification Summary & Compliance
This screw features a Class 3A thread fit with UNF fine threads and a right-hand thread direction, ensuring high precision and interchangeability. It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity for global industrial use.
