S-91268A959 1 1/2"-6 x 5 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
- Exceptional load-bearing capacity with 150,000 PSI tensile strength for reliable performance in high-stress applications
- Superior wear resistance due to Rockwell C33 hardness, extending service life in demanding environments
- Secure fastening with coarse UNC threading providing excellent grip and vibration resistance in various materials
- Easy installation and removal with external hex drive design compatible with standard tools
- Precise Class 2A thread fit ensuring consistent engagement and reduced risk of cross-threading
- Partial threading design offering optimal clamping force distribution along the shank
- Regulatory compliance assurance meeting industry standards and environmental regulations
Professional Applications & Engineering Value
This Grade 8 heavy-duty hex head screw delivers critical engineering solutions for industrial applications requiring superior mechanical properties. The high-strength steel construction combined with Rockwell C33 hardness provides exceptional resistance to shear forces and fatigue, making it ideal for structural connections, heavy machinery assembly, and equipment manufacturing. The 1 1/2"-6 UNC coarse thread configuration ensures rapid installation and reliable performance in soft metals, wood, and composite materials, while the external hex drive accommodates high-torque applications without stripping. The partially threaded design concentrates clamping force where needed most, preventing joint loosening under dynamic loads. These industrial hex screws solve critical fastening challenges in construction, automotive, and manufacturing sectors where failure is not an option.
Specification Summary & Compliance
This inch system fastener features precise Class 2A thread fit per UNC standards with 1 1/2"-6 coarse threading and 5 1/2" overall length. Manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring regulatory adherence.
