S-92240A539 1/4"-20 x 5/8" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
• Class 2A UNC coarse threads provide faster assembly and reduced cross-threading risk
• External hex drive design allows for high-torque installation with standard tools
• Full threading along the 5/8" length delivers maximum grip and uniform stress distribution
• Rockwell B70 hardness maintains thread integrity and resistance to wear
• Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees quality and environmental safety

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 18-8 stainless steel hex head screws combine corrosion resistance with high mechanical strength to prevent failure in moist or chemical-exposed environments. The UNC coarse thread design ensures quick, secure fastening in metals and plastics, reducing installation time while maintaining Class 2A thread fit precision. With an external hex drive and fully threaded shank, they provide consistent clamping force in machinery, construction, and automotive assemblies, minimizing loosening under dynamic loads. Their compliance with ASME B18.2.1 standards ensures dimensional accuracy, making them a trusted choice for OEMs and maintenance teams seeking durability and regulatory adherence.

Specification Summary & Compliance

This 1/4"-20 x 5/8" hex head screw features UNC coarse threads with Class 2A fit for consistent engagement and ease of assembly. Manufactured to ASME B18.2.1 specifications, it meets precise dimensional tolerances. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial applications.