S-90910A682 2-56 x 1/4" ASME B18.3 Stainless Steel Button Head Torx Plus Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments.
• Enhanced torque transmission and reduced cam-out using the Torx Plus IP6 drive, ensuring secure fastening and tool longevity.
• High tensile strength of 60,000 psi and Rockwell B55 hardness for reliable performance under heavy-duty loads.
• Easy alignment and a low-profile, rounded button head that provides a finished look while minimizing snagging.
• Consistent and reliable thread engagement with UNC coarse threads and Class 2A fit, facilitating quick assembly.
• Full threading along the 1/4" length offers maximum grip and versatility in various material thicknesses.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.

Professional Applications & Engineering Value

This 2-56 UNC rounded head screw is engineered to address critical needs in precision assembly and demanding industrial settings. The 18-8 stainless steel construction, combined with a passivated finish, provides excellent resistance to oxidation and chemical exposure, making it suitable for electronics, machinery, and outdoor equipment. The Torx Plus drive (IP6/T6) minimizes slippage and tool wear, allowing for higher torque application and reducing assembly errors. Its coarse UNC threads and Class 2A fit ensure quick, secure fastening in metals and plastics, while the fully threaded design offers flexibility across different joint requirements. Ideal for applications where vibration resistance, durability, and regulatory compliance are paramount, this screw delivers consistent performance in automotive, aerospace, and consumer goods manufacturing.

Specification Summary & Compliance

This fastener features a 2-56 UNC thread size with Class 2A thread fit for standard industrial tolerances, ensuring reliable engagement. It is manufactured in compliance with ASME B18.3 specifications, guaranteeing dimensional accuracy and performance. The screw meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming it is free from hazardous substances. With a right-hand thread direction, coarse thread spacing, and full threading along its 1/4" length, it adheres to recognized standards for quality and safety in global industrial applications.