S-91268A115 1 1/8"-7 x 3" 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 Grade 8 steel construction and Rockwell C33 hardness
- Excellent vibration resistance provided by coarse UNC threading and Class 2A thread fit
- Easy installation and removal with external hex drive and fully threaded design
- Compliance with industry standards including ASME B18.2.1 and SAE J429 for reliable performance
- Environmental regulation compliance meeting RoHS 3 and REACH requirements for safe usage
- Optimal torque transmission through substantial 1 11/16" hex head for secure fastening
Professional Applications & Engineering Value
This Grade 8 steel hex head screw delivers exceptional engineering value in demanding industrial environments where failure is not an option. The 1 1/8"-7 UNC coarse thread configuration provides superior grip strength in various materials while resisting vibration-induced loosening. With 150,000 psi tensile strength and Rockwell C33 hardness, this fully threaded fastener maintains integrity under extreme mechanical stress, making it ideal for heavy machinery, structural steel connections, and high-load assembly applications. The external hex drive design allows for high-torque installation, ensuring secure fastening in confined spaces where reliability is paramount for operational safety and reduced maintenance cycles.
Specification Summary & Compliance
This heavy-duty hex head screw features precision Class 2A thread fit with 1 1/8"-7 UNC coarse threading and right-hand thread direction. Manufactured to ASME B18.2.1 and SAE J429 specifications, the 3" length fastener demonstrates strict adherence to dimensional and performance standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across various industrial sectors while maintaining the high-strength characteristics required for critical applications.
