S-92620A551 1/4"-20 x 2 1/4" 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, ideal for high-stress structural and machinery applications.
- Superior corrosion resistance due to zinc yellow-chromate plating, extending service life in harsh industrial environments.
- High hardness rating (Rockwell C33) ensures excellent wear resistance and reduces thread deformation during installation.
- Reliable fastening performance with Class 2A thread fit, providing consistent engagement and ease of assembly.
- Optimized for quick installation featuring a coarse UNC thread and external hex drive for efficient torque application.
- Full threading along the 2 1/4" length allows for maximum grip and adjustability in various material thicknesses.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees dimensional accuracy and interchangeability for industrial use.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, construction equipment, and automotive frameworks. The steel construction, combined with zinc yellow-chromate plating, provides robust protection against rust and chemical exposure, reducing maintenance costs. The 1/4"-20 UNC coarse thread design ensures rapid installation and secure holding power in materials prone to vibration, while the external hex drive allows for high-torque application with standard tools. Its fully threaded body offers versatility for applications requiring deep engagement, making it a reliable choice for engineers seeking durability and compliance with ASME B18.2.1 specifications.
Specification Summary & Compliance
This fastener adheres to Class 2A thread fit tolerances for consistent performance and features a 1/4"-20 UNC coarse thread with right-hand direction. It meets ASME B18.2.1 and SAE J429 standards, ensuring dimensional precision and reliability. The product is manufactured in compliance with industry regulations for quality and safety, suitable for applications requiring high-strength Grade 8 fasteners.
