S-92620A241 1/4"-28 x 3/8" 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 load-bearing capability with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc yellow-chromate plating that protects against harsh industrial environments
- Precise thread engagement with Class 2A UNF fine threads ensuring secure, vibration-resistant connections
- Maximum thread contact through full threading along the entire 3/8" length for enhanced holding power
- High durability backed by Rockwell C33 hardness rating that maintains integrity under repeated use
- Optimized torque transmission via external hex drive design for easy installation with standard tools
- Industry compliance assurance meeting ASME B18.2.1 and SAE J429 specifications for quality and reliability
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance where failure is not an option. The UNF fine thread configuration provides superior resistance to vibration loosening compared to coarse threads, making them ideal for machinery, automotive assemblies, and precision equipment. The zinc yellow-chromate plating creates a protective barrier against corrosion in demanding environments, from manufacturing facilities to outdoor applications. With fully threaded design ensuring maximum grip length and 150,000 psi tensile strength, these fasteners prevent joint failure in heavy-duty applications. The external hex drive allows for high torque application without stripping, while the Class 2A thread fit guarantees consistent installation performance across production runs.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNF fine thread (1/4"-28) specifications. Complies with ASME B18.2.1 and SAE J429 standards for dimensional accuracy and mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance. The Grade 8 classification ensures consistent 150,000 psi tensile strength and Rockwell C33 hardness across all production batches.
