S-92620A263 1"-14 x 3 1/4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Grade 8 classification and 150,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh industrial environments
• Precise thread engagement with Class 2A thread fit and 1"-14 extra fine threading for secure fastening in critical assemblies
• Optimized torque transmission through external hex drive and 1 1/2" head width for easy installation with standard tools
• Enhanced durability with Rockwell C33 hardness rating, maintaining structural integrity under repeated stress
• Versatile partial threading design allowing for precise clamping force distribution across the 3 1/4" length
• Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for quality and safety

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance in construction equipment, machinery frames, and structural assemblies where vibration resistance and high tensile strength are critical. The zinc yellow-chromate plated steel construction provides superior protection against corrosion in challenging environments, while the 1"-14 extra fine threading ensures secure fastening in materials requiring precise thread engagement. The partially threaded design concentrates clamping force where needed most, preventing joint loosening under dynamic loads. These industrial screws solve common engineering challenges by combining 150,000 psi tensile strength with Rockwell C33 hardness, making them ideal for applications demanding both durability and reliability in inch fasteners for heavy machinery and equipment manufacturing.

Specification Summary & Compliance

These high-strength hex head screws feature precision Class 2A thread fit with UNS thread type and extra fine thread spacing for optimal performance. Manufacturing complies with ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and mechanical properties. The fasteners are fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial components. With 3 1/4" length and 2 1/4" minimum thread length, these screws maintain strict quality standards for professional industrial use.