S-91268A893 7/8"-9 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
- 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
- Optimized torque transmission through the external hex drive design, preventing tool slippage during installation
- Secure fastening in coarse materials enabled by UNC coarse threading with Class 2A fit for consistent engagement
- Full-length thread coverage ensures maximum grip strength across the entire 1½" length
- Regulatory compliance assurance with RoHS 3 and REACH standards for environmentally responsible sourcing
- Industry-standard compatibility through ASME B18.2.1 and SAE J429 certification for reliable interchangeability
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance where structural integrity is paramount. The 7/8"-9 UNC coarse thread configuration provides superior pull-out resistance in soft metals and wood, while the fully threaded design maintains consistent clamping force across joint interfaces. Engineered with 150,000 PSI tensile strength and Rockwell C33 hardness, they withstand extreme vibration and dynamic loading in heavy machinery, construction equipment, and structural steel connections. The external hex drive facilitates high-torque installation in confined spaces, making these steel fasteners ideal for maintenance, manufacturing, and infrastructure projects requiring dependable, high-strength bolting solutions.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 specifications meeting SAE J429 requirements for Grade 8 fasteners. Features Class 2A thread fit with 7/8"-9 UNC coarse threads and right-hand orientation. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Dimensional specifications include 1½" length, 1 5/16" head width, and 35/64" head height.
