S-94173A317 5/16"-24 x 3" 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional strength-to-weight ratio with 170,000 psi tensile strength and Rockwell C38 hardness for reliable performance in high-stress applications
• Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in demanding industrial environments
• Enhanced torque transmission through the external 12-point drive design, reducing tool slippage and installation damage
• Precision thread engagement with Class 2A thread fit and UNF fine threading for secure fastening in critical assemblies
• Integrated flange design eliminates the need for separate washers while providing increased bearing surface area
• Optimized partial threading allows for precise clamp load control and reduces thread galling in high-vibration applications
• Right-hand fine threading delivers superior holding power and resistance to loosening under dynamic loads

Professional Applications & Engineering Value

This high-strength 12-point flange screw delivers exceptional engineering value in demanding applications where reliability is paramount. The black-oxide alloy steel construction provides superior corrosion resistance while maintaining the 170,000 psi tensile strength required for heavy machinery, automotive assemblies, and industrial equipment. The external 12-point drive system ensures maximum torque transmission without cam-out, making it ideal for confined spaces and high-torque applications. The UNF fine thread configuration offers improved fatigue resistance and better sealing capabilities compared to coarse threads, while the integrated flange design distributes clamping force evenly, preventing surface damage and reducing assembly components. These industrial fasteners are engineered to withstand extreme conditions while maintaining precise Class 2A thread fit tolerances for consistent performance in critical connections.

Specification Summary & Compliance

This precision fastener features 5/16"-24 UNF fine threading with Class 2A thread fit tolerances ensuring consistent engagement and reliable performance. The manufacturing complies with UNF thread standards and maintains strict dimensional accuracy throughout production. The partially threaded design provides optimal clamp load control while the black-oxide surface treatment meets industry standards for corrosion protection. These components are manufactured from alloy steel with verified Rockwell C38 hardness and 170,000 psi tensile strength ratings, suitable for demanding industrial applications requiring high-strength fastening solutions.