S-91257A869 3/4"-10 x 11" 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 capability with Grade 8 steel construction and 150,000 psi tensile strength for critical structural applications
- Superior corrosion resistance through zinc yellow-chromate plating that withstands harsh industrial environments
- Optimized thread engagement with UNC coarse threads and Class 2A fit ensuring reliable installation and vibration resistance
- Enhanced torque transmission via external hex drive design and substantial 1 1/8" head width for secure tightening
- Partial threading design providing unthreaded shank strength where maximum clamping force is required
- Consistent performance backed by Rockwell C33 hardness rating for maintained mechanical properties under stress
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for quality and safety
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers exceptional engineering value in heavy machinery, structural steel connections, and industrial equipment assembly. The 3/4"-10 UNC coarse thread configuration combined with Class 2A thread fit ensures rapid installation and reliable performance in high-vibration environments. The zinc yellow-chromate plating provides superior corrosion protection, extending service life in demanding conditions. With 150,000 psi tensile strength and Rockwell C33 hardness, this partially threaded fastener maintains integrity under extreme loads, while the external hex drive facilitates high-torque application. The 11" length with 2" minimum thread length offers versatile clamping capacity for thick material assemblies.
Specification Summary & Compliance
This heavy-duty hex head screw features precise Class 2A thread fit with 3/4"-10 UNC coarse threads and complies with ASME B18.2.1 and SAE J429 manufacturing specifications. The fastener meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations for chemical safety. Manufactured from Grade 8 steel with zinc yellow-chromate plating finish, it delivers consistent dimensional accuracy and performance reliability for industrial applications.
