S-92865A450 5/8"-18 x 5 1/2" 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 demanding applications
- Superior corrosion resistance through zinc plating that protects against rust in harsh industrial environments
- Precise thread engagement with Class 2A fit UNF fine threading for secure, vibration-resistant connections
- Enhanced durability from Rockwell C25 hardness that maintains structural integrity under repeated stress
- Optimal torque transfer via external hex drive design that prevents tool slippage during installation
- Full-threaded coverage along the 5½" length for maximum grip strength across the entire fastener
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, and RoHS 3 standards for quality and safety
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers critical performance where structural integrity matters most. The 5/8"-18 UNF fine threading provides superior resistance to vibrational loosening in heavy machinery, construction equipment, and transportation applications. The zinc plated steel construction offers essential corrosion protection for outdoor or high-moisture environments, while the external hex drive enables high-torque installation without stripping. With fully threaded design and 120,000 psi tensile strength, this fastener maintains clamping force in dynamic load conditions, preventing joint failure in critical assemblies. Engineers specify these industrial screws for structural connections requiring predictable, repeatable performance under sustained mechanical stress.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNF fine thread specifications. Complies with ASME B18.2.1 and SAE J429 manufacturing standards for Grade 5 fasteners. Meets RoHS 3 (2015/863/EU) compliance requirements for restricted substances. Features right-hand threading with 18 threads per inch spacing and 0.625" thread diameter in inch system measurements.
