S-91247A562 1/4"-20 x 5" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc plating, extending service life in industrial environments
• Optimized thread engagement with UNC coarse threads providing faster assembly and reduced cross-threading risk
• Precise mechanical properties with Rockwell C25 hardness ensuring consistent performance under stress
• Secure fastening capability through external hex drive design allowing high torque application
• Reduced material costs with partial threading where full threading isn't required
• Regulatory compliance assurance meeting ASME B18.2.1 standards for quality and reliability

Professional Applications & Engineering Value

This Grade 5 hex head screw delivers critical engineering solutions for industrial applications where high tensile strength and reliable fastening are paramount. The zinc plated steel construction provides essential corrosion protection in manufacturing environments, while the UNC coarse thread design enables rapid installation in structural assemblies, machinery, and equipment frameworks. The partially threaded configuration optimizes material usage without compromising clamping force, making it ideal for applications requiring precise joint compression. With external hex drive compatibility, these screws accommodate standard industrial tools for efficient maintenance and assembly operations across construction, automotive, and heavy equipment sectors where ASME B18.2.1 compliance ensures consistent performance and interchangeability.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerance for reliable assembly compatibility and features 1/4"-20 UNC coarse threads meeting standardized dimensional requirements. Manufacturing conforms to ASME B18.2.1 specifications where applicable under SAE J429 standards for Grade 5 mechanical properties. The product demonstrates full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety, ensuring environmental responsibility in industrial supply chains.