S-91286A802 1/2"-13 x 7/8" 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 tensile strength of 150,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the zinc-flake coating extends service life in harsh environments, minimizing maintenance and replacement costs.
- High hardness (Rockwell C33) provides excellent wear resistance, maintaining thread integrity and drive engagement over repeated use.
- Coarse UNC threads with Class 2A fit allow for quick assembly and secure fastening, improving installation efficiency in construction and machinery.
- Full threading along the 7/8" length offers maximum grip and adjustability, ensuring uniform clamping force across joined materials.
- External hex drive design enables easy installation with standard tools, reducing labor time and enhancing workplace safety.
- Compliance with ASME, SAE, RoHS, and REACH standards guarantees product quality and environmental safety, supporting global supply chain requirements.
Professional Applications & Engineering Value
Engineered for demanding industrial environments, this Grade 8 hex head screw combines high-strength steel and a zinc-flake coating to address common challenges like vibration loosening and corrosion in heavy machinery, structural frameworks, and automotive assemblies. The coarse UNC thread and Class 2A fit ensure precise alignment and robust holding power, reducing the need for frequent retightening in dynamic loads. By providing consistent 150,000 psi tensile strength and full threading, it delivers reliable performance in construction, manufacturing, and equipment maintenance, where fastener integrity is critical to operational safety and longevity.
Specification Summary & Compliance
This fastener adheres to Class 2A thread fit per UNC standards, ensuring dimensional accuracy for secure assemblies. It meets ASME B18.2.1 and SAE J429 specifications for Grade 8 mechanical properties, and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial use.
