S-91286A431 5/8"-11 x 6" 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 capability with 150,000 psi tensile strength for demanding industrial applications
- Superior corrosion resistance provided by zinc-flake coating, extending service life in harsh environments
- Reliable mechanical performance ensured by Grade 8 steel construction and Rockwell C33 hardness
- Optimized torque transmission through external hex drive design for secure installation
- Precision thread engagement with Class 2A thread fit and UNC coarse threads for consistent fastening
- Versatile partial threading allowing both clamping and alignment functions in structural assemblies
- Comprehensive compliance with ASME B18.2.1 and SAE J429 standards for quality assurance
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance in heavy machinery, structural steel connections, and industrial equipment where high tensile strength and reliable fastening are paramount. The zinc-flake coated steel construction provides exceptional corrosion protection, significantly reducing maintenance requirements in challenging environments. The 5/8"-11 UNC coarse thread configuration ensures rapid installation and superior resistance to vibration loosening, while the partial threading design offers optimal clamping force distribution. Engineered for industrial hex screw applications requiring 150,000 psi tensile strength, these fasteners maintain integrity under extreme loads, making them ideal for construction, manufacturing, and heavy equipment maintenance where failure is not an option.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse threads meeting ASME B18.2.1 specifications. These Grade 8 hex head screws comply with SAE J429 standards and feature zinc-flake coating for enhanced durability. The fasteners are fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental responsibility while delivering 150,000 psi tensile strength and Rockwell C33 hardness for demanding industrial applications.
