S-92620A750 1/2"-20 x 3" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum Load-Bearing Capacity: With a 150,000 psi tensile strength and Grade 8 classification, this screw reliably handles extreme stress in demanding industrial environments.
• Superior Corrosion Resistance: The zinc yellow-chromate plating provides a durable barrier against rust and environmental degradation, extending service life.
• Precise Thread Engagement: Class 2A thread fit ensures consistent, reliable fastening with minimal risk of cross-threading or loosening under vibration.
• High-Torque Application Ready: The external hex head design allows for easy installation and removal with standard tools, even in high-torque scenarios.
• Full Thread Coverage for Enhanced Grip: Fully threaded design maximizes holding power across the entire 3" length, ideal for thick materials.
• Industry Standard Compliance: Manufactured to ASME B18.2.1 and SAE J429 specifications, guaranteeing interchangeability and performance reliability.
• Fine Thread Advantage: UNF fine threading offers improved adjustment precision and better resistance to vibrational loosening compared to coarse threads.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical challenges in construction, machinery assembly, and automotive sectors where failure is not an option. The combination of high-strength steel and Rockwell C33 hardness ensures exceptional shear and tensile performance, preventing stripping and deformation under load. The zinc yellow-chromate finish is specifically chosen for environments exposed to moisture and chemicals, significantly reducing maintenance needs and downtime. Its UNF fine thread and Class 2A fit provide a secure, vibration-resistant connection in precision equipment, making it a trusted fastener for critical structural joints and high-stress assemblies that demand ASME B18.2.1 compliance.

Specification Summary & Compliance

This fastener adheres to ASME B18.2.1 and SAE J429 standards, ensuring dimensional accuracy and mechanical properties. Thread specifications include 1/2"-20 UNF with a Class 2A thread fit for consistent engagement. The product meets common industry requirements for material quality and performance, suitable for applications demanding verified high-strength and reliability.