S-92620A273 1 1/8"-12 x 5" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capability – Grade 8 classification and 150,000 psi tensile strength ensure reliable performance in high-stress industrial environments.
• Superior Corrosion Resistance – Zinc yellow-chromate plating provides durable protection against rust and environmental degradation, extending service life.
• Precision Thread Engagement – Class 2A thread fit and UNF fine thread spacing offer secure, vibration-resistant fastening with reduced risk of cross-threading.
• Optimized Torque Application – External hex drive and 1 11/16" head width enable efficient installation with standard tools, minimizing assembly time.
• Enhanced Durability – Rockwell C33 hardness and steel construction resist wear and deformation under repeated loads.
• Versatile Partial Threading – 2 1/2" minimum thread length allows for adjustable clamping force in varied material thicknesses.
• Regulatory Assurance – Compliant with ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for safe, globally accepted usage.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical challenges in machinery assembly, structural framing, and equipment manufacturing. The 1 1/8"-12 UNF fine thread design ensures superior clamp load distribution and vibration resistance, preventing joint failure in dynamic environments. Partially threaded construction allows precise adjustment where full threading isn't required, while the zinc yellow-chromate plating delivers reliable corrosion protection in humid or chemically exposed settings. With 150,000 psi tensile strength and Rockwell C33 hardness, it maintains integrity under extreme mechanical stress, making it ideal for construction, automotive, and heavy equipment sectors where fastener reliability directly impacts operational safety and longevity.

Specification Summary & Compliance

This screw maintains Class 2A thread fit tolerance per UNF standards with fine thread spacing for precise engagement. Manufacturing follows ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to international environmental and safety standards for industrial components.