S-90600A127 1/4"-20 x 1/2" ASME B18.3 Stainless Steel Button Head Torx Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction and passivated finish, ideal for harsh industrial environments.
• Enhanced torque transmission and reduced cam-out due to the T27 Torx drive, ensuring secure and efficient installation.
• High mechanical strength and durability from 60,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
• Precise and reliable thread engagement with Class 3A thread fit and UNC coarse threads for consistent performance.
• Full threading along the 1/2" length provides maximum grip and holding power in assembled components.
• Rounded button head design offers a low-profile, finished appearance while minimizing snagging.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and regulatory adherence.

Professional Applications & Engineering Value

These 1/4-20 UNC Torx Rounded Head Screws are engineered to address critical challenges in industrial assembly, such as fastener failure under stress and corrosion in demanding environments. The 18-8 Stainless Steel material, combined with a passivated finish, provides exceptional resistance to rust and chemical exposure, making them suitable for applications in machinery, automotive, and outdoor equipment. The T27 Torx drive ensures high torque transfer without stripping, reducing installation errors and maintenance downtime. With a Class 3A thread fit and fully threaded design, these screws deliver consistent clamping force and vibration resistance, enhancing the longevity and reliability of your assemblies in heavy-duty and precision applications.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including a 1/4"-20 UNC thread size with Class 3A thread fit for tight tolerances and reliable performance. It meets ASME B18.3 specifications for dimensional accuracy and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. The screw is manufactured with a right-hand thread direction and coarse thread spacing, optimized for efficient assembly in various industrial settings.