S-92949A567 1/4"-28 x 1 1/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments.
• Exceptional tensile strength of 70,000 psi ensures reliable load-bearing capacity and joint integrity under stress.
• Precision Class 3A thread fit provides tight, secure fastening with minimal play for vibration-resistant assemblies.
• 5/32" hex drive design allows for easy, high-torque installation and removal with standard tools.
• Fully threaded shank maximizes grip length and distributes clamping force evenly across the entire engagement.
• Rounded button head profile offers a low-profile, aesthetically clean finish while reducing snagging risks.
• Compliance with ASME B18.3 and environmental regulations guarantees consistent quality and safe use in regulated industries.

Professional Applications & Engineering Value

Engineered for demanding applications, these 1/4"-28 UNF rounded head screws address critical needs in machinery, electronics, and structural assemblies where corrosion resistance and high tensile strength are paramount. The 18-8 stainless steel material, enhanced by a passivated finish, withstands exposure to moisture, chemicals, and outdoor elements, reducing maintenance and replacement costs. The fine UNF threading and Class 3A fit ensure precise alignment and secure fastening in components requiring minimal tolerance deviation, such as precision instruments or automotive systems. Combined with a hex drive for efficient installation, these screws deliver long-term reliability in industrial fastening scenarios, from conveyor systems to enclosures, where vibration loosening or material degradation could compromise performance.

Specification Summary & Compliance

This screw features a 1/4"-28 UNF fine thread with Class 3A dimensional accuracy, ensuring tight fit and interchangeability. It is manufactured in accordance with ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally sensitive and global markets. The fully threaded design and right-hand thread direction adhere to standard industrial practices for consistent performance.