S-92620A257 3/4"-16 x 12" 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 Grade 8 steel construction and 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in demanding industrial environments
- Precise thread engagement with Class 2A thread fit and UNF fine threading for secure fastening and vibration resistance
- Optimized strength-to-weight ratio through partial threading design, maintaining structural integrity while reducing material usage
- Easy installation and removal with standard external hex drive and 1 1/8" head width for compatibility with common tools
- Guaranteed mechanical properties backed by Rockwell C33 hardness rating, ensuring consistent performance across batches
- Regulatory compliance assurance meeting ASME B18.2.1 and SAE J429 specifications for quality and safety standards
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where failure is not an option. The 3/4"-16 UNF fine threading provides superior resistance to vibrational loosening, while the partial threading design concentrates strength where needed most. The zinc yellow-chromate plating creates a robust barrier against corrosion in harsh environments, from manufacturing facilities to outdoor installations. With its 150,000 psi tensile strength and Rockwell C33 hardness, this fastener maintains integrity under extreme loads, making it ideal for construction equipment, automotive frames, and industrial machinery applications where reliability and durability are paramount.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with 3/4"-16 UNF fine threading and minimum 2" thread length. Complies with ASME B18.2.1 and SAE J429 standards for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements, ensuring safe use across regulated industries.
