S-91271A585 5/16"-18 x 1 1/4" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional torque transmission with external 12-point drive design for reliable installation in high-stress applications
• Superior thread engagement through Class 3A precision fit ensures consistent performance and vibration resistance
• Maximum durability from alloy steel construction with 170,000 psi tensile strength for heavy-duty industrial use
• Enhanced load distribution with integrated flange design that eliminates the need for separate washers
• Optimized installation efficiency with fully threaded coarse (UNC) design for faster assembly in various materials
• Long-term reliability supported by Rockwell C37 hardness for excellent wear resistance and dimensional stability
• Regulatory compliance assurance meeting IFI 115 specifications for quality and performance standards

Professional Applications & Engineering Value

This 12-point screw with 5/16"-18 UNC coarse threads delivers critical engineering solutions for demanding industrial environments. The alloy steel construction provides exceptional strength-to-weight ratio, making it ideal for heavy machinery, structural assemblies, and equipment manufacturing where vibration resistance is paramount. The external 12-point drive system offers superior torque transmission compared to standard hex drives, reducing the risk of fastener failure during high-torque applications. With its Class 3A thread fit and fully threaded design, this fastener ensures precise alignment and maximum thread engagement in both soft and hard materials, significantly reducing the potential for loosening under dynamic loads. The integrated flange provides enhanced clamping force distribution, making it particularly valuable in automotive, construction, and industrial equipment applications where reliability cannot be compromised.

Specification Summary & Compliance

This 12-point screw features precision Class 3A thread fit with 5/16"-18 UNC coarse threads and right-hand threading direction. Manufactured to exacting IFI 115 specifications with complete RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance. The fastener maintains dimensional accuracy with 1-1/4" length, 5/16" head dimensions, and 15/32" flange diameter, ensuring consistent performance across industrial applications.