S-92620A701 1/4"-28 x 1 1/8" 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
- Maximum load-bearing capacity with 150,000 psi tensile strength, ideal for high-stress structural applications
- Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
- Precise thread engagement with Class 2A UNF fine threads ensuring secure, vibration-resistant connections
- Exceptional durability from Rockwell C33 hardness, maintaining fastener integrity under repeated stress
- Full-threaded design providing consistent clamping force along the entire 1-1/8" length
- Standard-compliant reliability manufactured to ASME B18.2.1 and SAE J429 specifications
- Easy installation and removal with external hex drive design for standard wrench compatibility
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance in demanding industrial settings where fastener failure is not an option. The combination of high-strength steel construction and fine UNF threading (1/4"-28) provides superior resistance to vibration loosening in machinery, automotive assemblies, and structural frameworks. The zinc yellow-chromate plating creates a protective barrier against corrosion in outdoor or chemically aggressive environments, while the fully threaded design ensures maximum thread engagement for uniform stress distribution. Engineered to ASME B18.2.1 standards, these fasteners offer predictable performance and interchangeability, reducing assembly time and maintenance costs in heavy-duty applications.
Specification Summary & Compliance
This 1/4"-28 x 1-1/8" hex head screw features Class 2A thread fit tolerance for precise assembly, right-hand UNF fine threading, and complies with ASME B18.2.1 and SAE J429 manufacturing specifications. The fastener meets industry standards for dimensional accuracy and mechanical properties, including the specified 150,000 psi tensile strength and Rockwell C33 hardness characteristic of Grade 8 fasteners.
