S-92327A819 5/16"-18 x 2" ASME B18.2.1, SAE J429 Square Head Screws
Square 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 120,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
- Precision thread engagement with Unified Class 3A fit ensuring secure fastening and vibration resistance
- Optimized installation efficiency featuring external square drive for high-torque application without cam-out
- Enhanced durability with Rockwell C25 hardness providing excellent wear resistance and structural integrity
- Versatile coarse threading (UNC) enabling quick assembly and reduced cross-threading risks in industrial settings
- Full-length threading allowing maximum adjustment flexibility and uniform stress distribution
Professional Applications & Engineering Value
This SAE Grade 5 square head screw delivers critical engineering solutions for heavy-duty industrial applications where vibration resistance and structural integrity are paramount. The zinc yellow-chromate plating provides superior corrosion protection in manufacturing environments exposed to moisture and chemicals, while the external square drive enables high-torque installation without stripping common in hex drives. The UNC coarse threading ensures rapid assembly in construction equipment, agricultural machinery, and structural frameworks where time-efficient maintenance is crucial. With fully threaded design and Class 3A thread fit, this fastener maintains consistent clamping force under dynamic loads, preventing loosening in vibrating systems and reducing maintenance frequency across industrial operations.
Specification Summary & Compliance
Manufactured to exact inch system dimensions with precision Unified Standard Class 3A thread tolerance for consistent fit. Complies with ASME B18.2.1 dimensional specifications and SAE J429 material standards, ensuring interchangeability and reliability. Features 5/16"-18 UNC coarse threading with right-hand direction and full threading along the 2" length. The steel construction meets SAE Grade 5 mechanical properties including 120,000 psi tensile strength and Rockwell C25 hardness, suitable for medium to heavy-duty industrial applications requiring certified performance standards.
