S-91268A108 1/4"-20 x 1 1/2" 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 demanding industrial applications
- Superior wear resistance due to Rockwell C33 hardness, ensuring long service life under high-stress conditions
- Reliable thread engagement with Class 2A thread fit and UNC coarse threads for secure fastening in various materials
- Easy installation and removal using standard 7/16" external hex head with common tools
- Optimized strength-to-weight ratio through Grade 8 steel construction and partial threading design
- Compliance with major industry standards including ASME B18.2.1 and SAE J429 for quality assurance
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for global supply chain integration
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers exceptional engineering value in heavy machinery, construction equipment, and automotive assemblies where high tensile strength is critical. The 1/4"-20 UNC coarse thread configuration provides superior resistance to vibration loosening while enabling faster installation in steel frameworks and structural components. Manufactured from high-grade steel with Rockwell C33 hardness, this partially threaded fastener maintains integrity under extreme loads and repetitive stress cycles. The external hex drive design allows for high torque application without stripping, making it ideal for maintenance-critical applications requiring reliable disassembly and reassembly. These industrial hex bolts solve common failure points in equipment subjected to dynamic loading and harsh operating environments.
Specification Summary & Compliance
This 1/4"-20 x 1-1/2" hex head screw features precise Class 2A thread fit with UNC coarse threading and right-hand thread direction. The fastener meets ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) ensures environmental responsibility and global regulatory acceptance for industrial supply chains.
