S-91268A979 1"-8 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
- Maximum load-bearing capability with 150,000 PSI tensile strength for critical structural applications
- Superior durability and wear resistance thanks to Rockwell C33 hardness and Grade 8 steel construction
- Reliable fastening performance with Class 2A thread fit ensuring precise engagement and vibration resistance
- Easy installation and removal with external hex drive and 1 1/2" head width for standard wrench compatibility
- Optimized thread engagement through 1"-8 UNC coarse threading and 2 1/4" minimum thread length
- Reduced material stress concentration with partially threaded design for improved fatigue resistance
- Compliance with major industrial standards including ASME B18.2.1 and SAE J429 for guaranteed quality
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers exceptional engineering value in demanding industrial environments where failure is not an option. The 1"-8 UNC coarse thread configuration provides superior holding power in structural steel applications, while the partially threaded design concentrates strength where needed most, preventing stress fractures in high-vibration machinery. Manufactured from premium steel with Rockwell C33 hardness, this fastener maintains integrity under extreme loads in construction equipment, heavy machinery frames, and industrial assembly systems. The external hex drive and substantial 1 1/2" head width ensure secure tool engagement during installation, reducing stripping risks in high-torque applications. These heavy-duty hex bolts solve critical fastening challenges where standard fasteners would compromise safety and performance.
Specification Summary & Compliance
This 6" length hex head screw features precise Class 2A thread fit per UNC standards with 1"-8 coarse thread spacing and 2 1/4" minimum thread length. Manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict material restrictions.
