S-91286A292 7/16"-20 x 1" 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
- Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc-flake coating, extending service life in harsh industrial environments
- Precise thread engagement with UNF fine threading and Class 2A fit ensuring secure fastening and vibration resistance
- High durability backed by Rockwell C33 hardness for maintained integrity under repeated use
- Easy installation and removal with external hex drive design allowing standard wrench access
- Compliance assurance meeting ASME B18.2.1 and SAE J429 standards for consistent quality and interchangeability
- Environmental responsibility through RoHS 3 and REACH compliance, safe for regulated industries
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical reliability in demanding applications where failure is not an option. The steel construction with UNF fine threading provides superior resistance to loosening under vibration, making it ideal for heavy machinery, automotive assemblies, and structural frameworks. The zinc-flake coated finish offers exceptional corrosion protection, significantly outperforming standard zinc plating in harsh environments. With full threading along the 1" length, it ensures maximum grip strength in thick materials. Engineers specify this fastener for its proven performance in high tensile strength applications, where the combination of material properties and precision manufacturing prevents joint failure and reduces maintenance cycles.
Specification Summary & Compliance
This fastener maintains Class 2A thread fit tolerances with 7/16"-20 UNF fine threads and right-hand orientation. Manufacturing complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting current environmental regulations for hazardous substance restrictions.
