S-92620A552 1/4"-20 x 2 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capability with 150,000 psi tensile strength for critical structural applications
• Superior corrosion protection through zinc yellow-chromate plating that withstands harsh industrial environments
• Exceptional hardness and durability with Rockwell C33 rating to resist wear and deformation under stress
• Reliable installation and removal with external hex drive design for secure tool engagement
• Optimized thread performance through Class 2A fit UNC coarse threads ensuring proper engagement
• Full-length threading provides consistent clamping force along the entire 2½" length
• Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for quality assurance

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers exceptional engineering value in demanding industrial applications where failure is not an option. The combination of high-strength steel construction and zinc yellow-chromate plating addresses critical challenges in heavy machinery, construction equipment, and automotive assemblies where both mechanical stress and environmental exposure are concerns. The UNC coarse thread configuration with Class 2A fit ensures rapid installation and reliable performance in vibration-prone environments, while the external hex drive provides positive torque transmission for precise clamping force control. Engineered to withstand extreme conditions, this fully threaded fastener maintains integrity in structural connections, frame assemblies, and high-stress mechanical systems where consistent performance under load is paramount.

Specification Summary & Compliance

This industrial fastener features precise 1/4"-20 UNC coarse threads with Class 2A fit tolerance for optimal engagement. Manufactured from high-strength steel with Rockwell C33 hardness and 150,000 psi tensile strength, the screw complies with ASME B18.2.1 dimensional standards and SAE J429 Grade 8 mechanical properties. The zinc yellow-chromate plating provides corrosion resistance while meeting industry requirements for surface finishing. This specification ensures consistent performance and interchangeability in professional applications requiring reliable, high-strength fastening solutions.