S-94173A315 5/16"-18 x 5" 12-Point Screws
12-Point Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 170,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Black-oxide coating on alloy steel provides corrosion resistance and a durable, non-reflective finish suitable for harsh industrial environments.
- External 12-point drive and head allows for high-torque installation with standard tools, improving assembly efficiency and reducing slippage.
- Class 2A thread fit with UNC coarse threading offers easy engagement and consistent performance, minimizing cross-threading risks.
- Partially threaded flanged design eliminates the need for separate washers, providing secure clamping and vibration resistance.
- Rockwell C38 hardness ensures long-term durability and wear resistance, extending the screw's service life in demanding conditions.
- 5-inch length with 1-inch minimum thread provides versatile fastening depth for various material thicknesses in structural applications.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this 12-point screw combines black-oxide alloy steel construction with a UNC coarse thread to deliver superior clamping force and vibration resistance. The external 12-point drive enables efficient installation in confined spaces, while the flanged design distributes load evenly, preventing surface damage. Ideal for machinery, automotive, and construction assemblies requiring high tensile strength and reliable thread engagement, this fastener addresses common issues like loosening under dynamic loads and corrosion in challenging environments.
Specification Summary & Compliance
This screw meets Class 2A thread fit tolerances for consistent performance and is manufactured to UNC standards with a 5/16"-18 thread size. It complies with industry specifications for alloy steel fasteners, ensuring dimensional accuracy and reliability. The product adheres to relevant material and safety standards, including RoHS and REACH compliance, for use in regulated industrial sectors.
