S-92865A002 1/4"-28 x 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength of 120,000 PSI ensures reliable performance in demanding applications, reducing the risk of fastener failure.
• Enhanced corrosion resistance from zinc plating protects against rust and extends service life in harsh industrial environments.
• Precise UNF fine threading with Class 2A fit provides excellent vibration resistance and secure fastening in critical assemblies.
• High hardness rating (Rockwell C25) offers excellent wear resistance, maintaining thread integrity through repeated use.
• Full threading design allows for maximum grip length and uniform stress distribution across the entire fastener.
• External hex drive enables quick installation and high torque application with standard tools, improving assembly efficiency.
• Industry compliance with ASME B18.2.1, RoHS 3, and REACH ensures material safety and mechanical reliability for professional use.

Professional Applications & Engineering Value

These Grade 5 hex head screws deliver exceptional engineering value through their high-strength steel construction and zinc-plated finish, specifically designed to address common industrial challenges. The UNF fine thread spacing combined with Class 2A thread fit provides superior resistance to loosening under vibration, making them ideal for machinery, automotive components, and structural assemblies where reliability is critical. The fully threaded design ensures maximum engagement in both thick and thin materials, while the external hex drive facilitates efficient installation in confined spaces. These features collectively solve engineering pain points related to joint integrity, corrosion protection, and assembly efficiency in demanding B2B applications.

Specification Summary & Compliance

This 1/4"-28 hex head screw maintains precise Class 2A thread fit tolerances per UNF standards, ensuring consistent performance across applications. Manufacturing complies with ASME B18.2.1 specifications where applicable under SAE J429, guaranteeing dimensional accuracy and mechanical properties. The fastener meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) standards for chemical safety, making it suitable for regulated industries and international supply chains.