S-94173A319 5/16"-24 x 4" 12-Point Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide coating for extended service life in harsh industrial environments
• Superior torque transmission through external 12-point drive design, preventing tool slippage during high-tension applications
• Exceptional load-bearing capacity with 170,000 PSI tensile strength and Rockwell C38 hardness for heavy-duty fastening requirements
• Precision thread engagement with Class 2A fit and UNF fine threading, ensuring reliable vibration resistance and secure connections
• Integrated flange design eliminates need for separate washers while providing superior load distribution
• Optimized partial threading allows for precise clamp load control in critical assembly applications
• Industry-standard compatibility with 5/16"-24 UNF specifications for seamless integration into existing systems

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 12-point screws with black-oxide alloy steel construction address critical challenges in heavy machinery, automotive, and construction applications. The external 12-point drive system delivers maximum torque transfer efficiency, preventing costly fastener failures during high-stress assembly operations. With 170,000 PSI tensile strength and Rockwell C38 hardness, these industrial screws maintain structural integrity under extreme vibrational loads and dynamic stresses. The flanged design combined with Class 2A thread fit ensures uniform pressure distribution and reliable sealing in critical joints, while the black-oxide surface treatment provides essential corrosion protection in moisture-prone environments, significantly extending maintenance intervals and reducing total cost of ownership.

Specification Summary & Compliance

This 5/16"-24 UNF screw features precision Class 2A thread fit per ASME/ANSI standards with fine thread spacing for optimal clamping force. Manufacturing complies with industry standards for dimensional accuracy, including head width (3/8"), flange diameter (5/8"), and minimum thread length (1"). The partially threaded configuration and right-hand thread direction adhere to established engineering specifications. Material composition and surface treatment meet industrial requirements for mechanical performance and environmental compliance.