S-91257A863 3/4"-10 x 8" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance through zinc yellow-chromate plating that protects against harsh industrial environments
- Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring secure fastening and vibration resistance
- Enhanced durability from Rockwell C33 hardness providing excellent wear resistance and long service life
- Easy installation and removal with external hex drive design offering superior torque transmission
- Versatile partial threading allowing for both clamping and alignment functions in structural applications
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429 standards and environmental regulations
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assembly. The 3/4"-10 UNC coarse thread configuration provides superior pull-out resistance in steel frameworks, while the partial threading design allows for precise adjustment in bolted joints. The zinc yellow-chromate plated steel construction offers exceptional protection against corrosion in challenging environments, extending service life in outdoor applications and manufacturing facilities. With external hex drive compatibility, these fasteners enable high-torque installation using standard industrial tools, making them ideal for construction, automotive, and heavy equipment maintenance where reliability is paramount.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with 3/4"-10 UNC coarse thread specifications. Complies with ASME B18.2.1 dimensional standards and SAE J429 material requirements for Grade 8 fasteners. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for hazardous substance restrictions. The 8" length with 2" minimum thread length ensures consistent performance across industrial applications.
