S-91271A584 5/16"-18 x 7/8" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 170,000 psi tensile strength for reliable performance in high-stress applications
• Precision threading with Class 3A fit ensures secure fastening and vibration resistance in demanding environments
• Rockwell C37 hardness rating provides superior wear resistance and long-term durability
• Integrated flange design eliminates the need for separate washers while distributing clamping force evenly
• External 12-point drive system offers superior torque transmission and tool engagement for efficient installation
• Alloy steel construction delivers optimal strength-to-weight ratio for heavy-duty industrial applications
• Full threading along 7/8" length provides maximum grip and adjustment flexibility in various material thicknesses

Professional Applications & Engineering Value

This 12-point alloy steel screw with 5/16"-18 UNC coarse threading is engineered to address critical challenges in high-vibration and heavy-load environments. The Class 3A thread fit ensures precise engagement with mating components, reducing the risk of loosening under dynamic loads. The external 12-point drive configuration allows for higher torque application compared to standard hex drives, making it ideal for assembly lines where speed and reliability are paramount. The integrated flange design provides superior bearing surface distribution, preventing surface damage while maintaining clamping force in machinery, structural steel connections, and heavy equipment applications where 170,000 psi tensile strength is essential for safety and performance.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit and UNC coarse thread profile (5/16"-18) for optimal engagement. The screw meets IFI 115 specifications for dimensional accuracy and mechanical properties. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and workplace safety. Critical dimensions include 7/8" length, 5/16" head height and width, and 15/32" flange diameter, all manufactured to precise industrial tolerances for consistent performance.