S-92865A435 5/8"-18 x 1 3/4" 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 tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Superior corrosion resistance with zinc plating extends service life and maintains integrity in harsh industrial environments.
- High hardness rating (Rockwell C25) provides excellent wear resistance and durability under repetitive stress.
- Precise Class 2A thread fit allows for smooth assembly and secure fastening, minimizing cross-threading and improving installation efficiency.
- Full threading offers consistent engagement along the entire length, enhancing grip strength and load distribution.
- External hex drive design enables easy installation and removal with standard tools, speeding up maintenance and assembly processes.
- Compliance with major standards including ASME B18.2.1 and SAE J429 ensures consistent quality and interoperability in regulated industries.
Professional Applications & Engineering Value
This Grade 5 steel hex head screw is engineered to address critical fastening challenges in industrial settings. The 5/8"-18 UNF fine threading provides superior resistance to vibration loosening, making it ideal for machinery, automotive assemblies, and structural frameworks where stability is paramount. The zinc plated finish combats corrosion in humid or chemically aggressive environments, reducing maintenance frequency and downtime. With its external hex drive and Class 2A thread fit, it ensures quick, reliable installations without compromising on tensile strength or alignment accuracy. These features collectively enhance operational safety and longevity in heavy-duty applications, from construction equipment to manufacturing systems.
Specification Summary & Compliance
This fastener adheres to Class 2A thread tolerance per UNF standards, ensuring precise fit and function. It meets ASME B18.2.1 and SAE J429 specifications for dimensional consistency and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility in global supply chains.
