S-91286A294 7/16"-20 x 1 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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
- Maximum Load-Bearing Capacity - Grade 8 classification and 150,000 psi tensile strength ensure reliable performance in high-stress industrial applications
- Superior Corrosion Protection - Zinc-flake coating provides excellent resistance against rust and environmental degradation
- Precision Thread Engagement - Class 2A UNF fine threads offer consistent, reliable fastening with reduced vibration loosening
- Enhanced Installation Efficiency - External hex drive and 5/8" head width allow for easy installation with standard tools
- Full Thread Coverage - Completely threaded 1 1/2" length ensures maximum grip strength across the entire fastener
- Industry Compliance Assurance - Meets ASME B18.2.1 and SAE J429 standards for guaranteed quality and interchangeability
- Environmental Responsibility - RoHS 3 and REACH compliant for safe use in regulated industries
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these Grade 8 hex head screws deliver exceptional performance where failure is not an option. The zinc-flake coated steel construction provides superior corrosion resistance, extending service life in harsh conditions while maintaining Rockwell C33 hardness for durability. The 7/16"-20 UNF fine thread configuration ensures secure fastening in applications prone to vibration, making these fully threaded screws ideal for heavy machinery, structural assemblies, and automotive components. The external hex drive design facilitates quick installation and removal, reducing maintenance downtime in production environments where efficiency is critical.
Specification Summary & Compliance
This Grade 8 hex head screw features precision Class 2A thread fit with 7/16"-20 UNF fine threading and right-hand thread direction. Manufactured to exacting ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe industrial use. The fastener maintains 150,000 psi tensile strength and Rockwell C33 hardness throughout its 1 1/2" fully threaded length.
