S-92620A123 3/8"-32 x 1 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength for demanding applications with Grade 8 classification and 150,000 psi tensile strength, ensuring reliable performance under high stress.
• Superior corrosion resistance provided by the zinc yellow-chromate plating, extending the fastener's service life in harsh industrial environments.
• Precise engagement and vibration resistance from the 3/8"-32 UNEF extra fine thread, offering finer adjustment and improved holding power.
• High durability and wear resistance due to Rockwell C33 hardness, maintaining integrity through repeated use and assembly.
• Easy installation and removal with the external hex drive and hex head design, allowing for standard tool compatibility and high torque application.
• Optimized for specific assembly needs with a partially threaded shank, providing strong grip in the threaded section and clearance where needed.
• Guaranteed dimensional accuracy and interchangeability through Class 2A thread fit, ensuring consistent performance and reducing assembly errors.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty mechanical and structural applications. The steel material combined with extra fine UNEF threading (3/8"-32) delivers superior vibration resistance and precise load distribution, making it ideal for machinery, automotive assemblies, and equipment where loosening under dynamic loads is a concern. The zinc yellow-chromate plating provides a robust barrier against corrosion, essential for outdoor or chemically exposed environments. Its partially threaded design allows for targeted clamping force, reducing stress concentration and improving joint integrity. By meeting ASME B18.2.1 and SAE J429 specifications, it ensures reliability in high-stress scenarios, offering engineers a trusted solution for enhancing durability and safety in industrial fastening systems.

Specification Summary & Compliance

This fastener adheres to strict dimensional standards with a Class 2A thread fit for consistent accuracy and ease of assembly. It conforms to ASME B18.2.1 and SAE J429 specifications, ensuring compatibility and performance in regulated applications. The inch system measurements, including a 1 1/2" length and 3/8"-32 UNEF extra fine threads, provide precise engineering alignment. Compliance with industry norms guarantees reliability for mechanical and structural uses, supporting quality assurance in B2B procurement.