S-92865A578 5/16"-18 x 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 high-stress applications
- Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
- Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and secure fastening
- Enhanced durability from Rockwell C25 hardness, maintaining structural integrity under repeated stress
- Maximum grip and torque transmission through external hex drive design and 1/2" head width
- Full-threaded construction ensuring consistent holding power along the entire 1/2" length
- Industry-standard compatibility meeting ASME B18.2.1 and SAE J429 specifications for reliable interchangeability
Professional Applications & Engineering Value
These Grade 5 hex head screws deliver critical performance advantages in demanding industrial applications where vibration resistance and structural integrity are paramount. The zinc plated steel construction provides essential corrosion protection for machinery, equipment assemblies, and structural frameworks exposed to environmental elements. The coarse UNC threading with Class 2A fit ensures rapid installation and secure fastening in materials where fine threads might strip or fail. With fully threaded design and external hex drive, these fasteners offer maximum torque application and uniform clamping force distribution, making them ideal for heavy-duty applications in construction, automotive, and manufacturing sectors where 120,000 psi tensile strength is required to withstand extreme mechanical stresses.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread profile (5/16"-18) ensuring consistent performance and interchangeability. Complies with ASME B18.2.1 and SAE J429 Grade 5 specifications for mechanical properties and dimensional requirements. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for hazardous substance restrictions, ensuring safe use across global markets.
