S-91271A758 1/2"-20 x 1" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Superior torque transmission with external 12-point drive design for reliable installation in high-stress applications
• Enhanced load distribution through integrated flange eliminates need for separate washers and reduces assembly components
• Precision thread engagement with Class 3A UNF fine threads ensures vibration resistance and secure fastening
• Exceptional mechanical strength from alloy steel construction with 170,000 psi tensile strength for heavy-duty applications
• Optimized hardness characteristics at Rockwell C37 provides excellent wear resistance while maintaining ductility
• Full threading capability allows maximum grip length and consistent clamping force along the entire fastener
• Regulatory compliance assurance meeting IFI 115 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

This 12-point flanged screw delivers critical engineering solutions for industrial assemblies requiring high-strength fastening with precise torque control. The alloy steel construction combined with Rockwell C37 hardness provides optimal balance between strength and toughness, preventing thread stripping under extreme loads. The external 12-point drive system offers superior torque transmission compared to standard hex drives, reducing the risk of tool slippage in confined spaces. The integrated flange design distributes clamping force over a wider surface area (0.75" diameter), minimizing surface damage and eliminating the need for separate washers. With Class 3A UNF fine threads (1/2"-20), this fastener ensures precise fitment in critical applications where vibration resistance and leak prevention are paramount, making it ideal for heavy machinery, automotive systems, and precision equipment assemblies.

Specification Summary & Compliance

This industrial fastener features precision Class 3A thread fit with UNF 1/2"-20 fine threading and right-hand thread direction. Manufacturing complies with IFI 115 specifications for dimensional accuracy and performance standards. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. Critical dimensions include 1" length, 0.5" thread diameter, and 0.75" flange diameter, providing consistent performance in demanding applications.