S-94173A331 7/16"-14 x 4 1/2" 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 170,000 PSI tensile strength for reliable performance in demanding applications
• Superior corrosion resistance provided by black-oxide coating on alloy steel, extending service life in harsh environments
• Optimal torque transmission through external 12-point drive design, preventing tool slippage during installation
• Enhanced stability and distribution from integrated flange, reducing the need for separate washers
• Precise thread engagement with Class 2A fit UNC coarse threading, ensuring consistent fastening performance
• Reduced installation time with partially threaded design, allowing for quicker assembly in appropriate applications
• Excellent durability with Rockwell C38 hardness, maintaining structural integrity under repeated stress

Professional Applications & Engineering Value

This high-strength 12-point screw delivers exceptional engineering value for industrial applications requiring reliable fastening under extreme conditions. The black-oxide alloy steel construction provides superior corrosion resistance while maintaining the 170,000 PSI tensile strength necessary for heavy machinery, structural assemblies, and automotive components. The external 12-point drive enables maximum torque application without cam-out, making it ideal for high-torque assembly operations. The UNC coarse threading with Class 2A fit ensures quick installation and reliable performance in vibration-prone environments, while the integrated flange distributes clamping force evenly, preventing surface damage and reducing assembly components. This combination of features makes it particularly valuable for construction equipment, industrial machinery, and automotive systems where heavy-duty fastening solutions are critical.

Specification Summary & Compliance

This 12-point screw features precise 7/16"-14 UNC coarse threading with Class 2A thread fit per ASME standards, ensuring dimensional accuracy and reliable performance. The partially threaded design with 4-1/2" length and 1-1/4" minimum thread length provides optimal fastening characteristics. Manufactured from alloy steel with black-oxide surface treatment, the fastener meets industry standards for heavy-duty applications and complies with relevant industrial specifications for mechanical properties and performance requirements.