S-91255A206 8-32 x 2 1/4" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide coating, ideal for harsh industrial environments and reducing maintenance needs.
• Superior mechanical strength with 120,000 psi tensile strength and Rockwell C39 hardness for reliable performance under high-stress conditions.
• Precise, secure fastening ensured by Class 3A thread fit, minimizing the risk of loosening in critical assemblies.
• Easy installation and removal with a 3/32" Hex Drive and rounded button head design, allowing for efficient tool access in confined spaces.
• Broad compatibility with UNC coarse threads and right-hand threading, making it suitable for a wide range of standard industrial equipment.
• Full threading along the 2 1/4" length provides consistent grip and adjustability across the entire fastener.
• Compliance with major industry standards including ASME B18.3 and ASTM F835, ensuring quality and reliability for professional use.

Professional Applications & Engineering Value

This 8-32 UNC screw is engineered from Black-Oxide Alloy Steel to address common industrial challenges such as corrosion and mechanical failure. The rounded head style and hex drive facilitate quick assembly in tight spaces, while the Class 3A thread fit offers precise engagement to prevent vibration-induced loosening in machinery, automotive, and electronics applications. Its coarse thread design ensures rapid installation and robust holding power, making it a dependable choice for high-vibration environments. With a fully threaded shank, it provides uniform clamping force, enhancing the integrity of assembled components and reducing the need for frequent replacements.

Specification Summary & Compliance

This product adheres to Class 3A thread tolerances for high precision, conforming to UNC standards with coarse thread spacing and right-hand direction. It meets ASME B18.3 and ASTM F835 specifications for dimensional accuracy and performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory adherence in industrial supply chains.