S-92949A848 1/4"-28 x 2 1/2" ASME B18.3, ASTM F879 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 environments.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration.
• Precise Class 3A thread fit provides excellent engagement and reduces the risk of cross-threading.
• Hex drive design allows for secure tool engagement and high torque application without slipping.
• Fine UNF threading offers better adjustment control and resistance to loosening in dynamic applications.
• Full threading along the 2 1/2" length enables versatile installation depth and strong holding power.
• Compliance with ASME B18.3, RoHS 3, and REACH ensures quality, safety, and environmental standards are met.

Professional Applications & Engineering Value

This 1/4"-28 UNF fully threaded screw is engineered to address critical challenges in industrial settings, such as corrosion, high stress, and assembly precision. Made from 18-8 Stainless Steel with a passivated finish, it resists rust and chemical exposure, making it ideal for machinery, automotive, and marine applications. The Class 3A thread fit and fine threading ensure tight tolerances and secure fastening, reducing maintenance needs. With a hex drive for easy installation and 70,000 psi tensile strength, it provides long-term reliability in heavy-duty assemblies, enhancing operational efficiency and reducing downtime.

Specification Summary & Compliance

This screw features a Class 3A thread fit per UNF standards, ensuring precise dimensional accuracy. It complies with ASME B18.3 manufacturing specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming it is free from hazardous substances and suitable for global industrial use.