S-92949A847 1/4"-28 x 1 3/4" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments.
- Exceptional thread engagement and vibration resistance due to Class 3A precision fit and UNF fine threading.
- High-strength fastening with a tensile strength of 70,000 psi and Rockwell B55 hardness for demanding applications.
- Secure and efficient installation enabled by the 5/32" hex drive, preventing stripping and allowing high torque application.
- Reliable compliance and safety meeting ASME B18.3 standards, RoHS 3, and REACH regulations for global industrial use.
- Versatile rounded button head design provides a low-profile, finished appearance while reducing surface snagging.
- Full threading along the 1 3/4" length ensures consistent clamping force and flexibility in material thickness.
Professional Applications & Engineering Value
This 18-8 stainless steel rounded head screw is engineered to solve critical challenges in industrial assembly, including corrosion-induced failure and thread loosening under vibration. The passivated finish enhances the natural corrosion resistance of the stainless steel, making it suitable for outdoor equipment, marine applications, and chemical processing environments. Its 1/4"-28 UNF fine thread and Class 3A thread fit deliver superior holding power and precision in metals and plastics, reducing the risk of cross-threading and ensuring long-term joint integrity. The combination of 70,000 psi tensile strength and a hex drive allows for reliable installation in high-stress applications, from machinery frames to electronic enclosures, providing engineers with a durable, compliant fastener that minimizes maintenance and replacement costs.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit tolerances for unified fine threads, ensuring precise engagement. 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, confirming its suitability for use in regulated and environmentally conscious industries.
