S-91271A575 1/4"-28 x 1 3/4" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant connections in critical assemblies.
• Alloy steel construction with Rockwell C37 hardness offers excellent durability and resistance to wear, extending service life in demanding environments.
• External 12-point drive and head allows for high-torque installation with standard tools, improving assembly efficiency and reducing slippage.
• Partially threaded design with integrated flange distributes clamping force evenly, preventing surface damage and enhancing joint stability.
• 1/4"-28 UNF fine threading delivers improved engagement and holding power in materials prone to stripping or requiring fine adjustment.
• Compliance with IFI 115, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations for safe, global use.

Professional Applications & Engineering Value

This 12-point screw is engineered to address common industrial challenges such as vibration loosening and high-load fatigue. Constructed from alloy steel, it combines 170,000 psi tensile strength and Rockwell C37 hardness to withstand extreme mechanical stresses in machinery, automotive, and aerospace applications. The 1/4"-28 UNF fine thread with a Class 3A fit ensures precise, secure fastening in components where thread integrity is critical. The external 12-point drive facilitates quick, high-torque installation with standard wrenches, reducing assembly time and tool wear. Additionally, the partially threaded and flanged design minimizes the risk of over-tightening and provides consistent clamping force, making it ideal for flanged connections and structured assemblies requiring reliable, long-term performance.

Specification Summary & Compliance

This screw features a 1/4"-28 UNF fine thread with Class 3A thread fit for high precision, a length of 1-3/4", and a flange diameter of 3/8". It is manufactured in accordance with IFI 115 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard reliability for professional use.