S-92620A744 1/2"-20 x 1" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Strength for Demanding Loads: Grade 8 classification and 150,000 PSI tensile strength ensure reliable performance under high stress and vibration, reducing the risk of fastener failure.
• Superior Corrosion Resistance: Zinc yellow-chromate plating provides a robust protective barrier, significantly extending service life in harsh or outdoor industrial environments.
• Precise and Secure Fastening: UNF fine threading with a Class 2A fit offers excellent vibration resistance and ensures a tight, secure connection in precision assemblies.
• Optimized for High-Torque Applications: The external hex head and 3/4" head width allow for high torque application with standard tools, facilitating efficient installation and maintenance.
• Full Compliance for Global Projects: Meets ASME B18.2.1 and SAE J429 specifications, and is compliant with RoHS 3 and REACH regulations, making it suitable for international supply chains.
• Enhanced Durability: Rockwell C33 hardness provides excellent wear resistance, maintaining thread integrity and fastener shape through repeated use.
• Versatile Fully Threaded Design: The 1" length with full threading offers maximum grip and adjustability across a wide range of material thicknesses.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to solve critical challenges in heavy machinery, construction, and automotive assemblies where vibration resistance and structural integrity are paramount. The UNF fine thread profile minimizes loosening under dynamic loads, a common failure point in industrial equipment. The zinc yellow-chromate plating directly addresses corrosion-related degradation, prolonging maintenance cycles in environments exposed to moisture or chemicals. Its 150,000 PSI tensile strength and Rockwell C33 hardness ensure that the fastener can withstand extreme pressures without stripping or shearing, providing a reliable, long-term solution for critical connections that demand exceptional durability and predictable performance.

Specification Summary & Compliance

This fastener features a 1/2"-20 UNF fine thread with a Class 2A thread fit for precise engagement. It is manufactured in compliance with ASME B18.2.1 and SAE J429 standards for dimensional accuracy and mechanical properties. The product is also verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for hazardous substances.