S-92865A431 5/8"-18 x 1" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc plating, extending service life in demanding industrial environments
- Precise thread engagement with UNF fine threading and Class 2A fit ensuring secure fastening and vibration resistance
- Optimized torque transmission via external hex drive design for efficient installation with standard tools
- Enhanced durability from Rockwell C25 hardness, maintaining structural integrity under repeated stress
- Full-thread coverage along the 1" length provides maximum grip strength and uniform load distribution
- Industry-standard compatibility with right-hand threading for seamless integration into existing assemblies
Professional Applications & Engineering Value
This Grade 5 steel hex head screw delivers critical engineering solutions for heavy machinery, structural frameworks, and industrial equipment where high tensile strength and vibration resistance are paramount. The UNF fine threading with Class 2A fit ensures precise alignment and prevents loosening in dynamic load conditions, while the zinc plating provides essential corrosion protection for outdoor or humid environments. Engineered with external hex drive configuration, it enables high-torque installation in confined spaces. These fully threaded fasteners maintain consistent clamping force across the entire 1" length, making them ideal for critical joints in construction, automotive, and manufacturing applications where failure is not an option.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 and SAE J429 specifications with Class 2A thread fit tolerances. Features 5/8"-18 UNF fine threading with right-hand direction and 0.625" thread diameter. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The Grade 5 classification guarantees consistent mechanical properties including 120,000 psi tensile strength and Rockwell C25 hardness.
