S-91257A470 3/8"-24 x 6" 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 with zinc yellow-chromate plating extends service life in harsh environments, minimizing maintenance needs.
- High hardness (Rockwell C33) provides excellent wear resistance and durability, ideal for heavy-duty machinery and equipment.
- Precision UNF fine threading with Class 2A fit offers secure, vibration-resistant connections, enhancing assembly stability.
- Partially threaded design allows for controlled clamping force and easier alignment in structural applications.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interchangeability for engineering projects.
- External hex drive head enables quick and easy installation with standard tools, improving workflow efficiency.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in industrial settings, such as vibration loosening and corrosion-induced degradation. Made from high-strength steel and finished with zinc yellow-chromate plating, it resists rust and wear in demanding environments like construction, automotive assembly, and heavy machinery. The UNF fine thread and Class 2A fit ensure tight, secure fastening that withstands dynamic loads, while the partially threaded shank provides optimal grip length for joint integrity. Ideal for applications requiring 150,000 psi tensile strength, this screw reduces downtime and maintenance costs, delivering long-term reliability in industrial fasteners systems.
Specification Summary & Compliance
This fastener adheres to precise dimensional standards, including Class 2A thread fit for consistent engagement and UNF fine threading with a size of 3/8"-24. It meets ASME B18.2.1 and SAE J429 specifications for quality assurance, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material sustainability.
