S-91271A851 3/4"-10 x 4" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional Strength and Durability: Crafted from high-grade alloy steel with a Rockwell C37 hardness and 170,000 psi tensile strength, this screw withstands extreme loads and resists wear in demanding applications.
• Superior Thread Engagement: The UNC coarse Class 3A thread fit ensures precise, reliable fastening with high resistance to vibration loosening, reducing maintenance needs.
• Integrated Flange for Secure Fastening: The built-in flange distributes clamping force over a wider area, enhancing joint stability and eliminating the need for a separate washer.
• High-Torque Drive System: The external 12-point drive and 3/4" drive size allow for high torque application with common tools, facilitating efficient installation and removal.
• Optimized for Heavy-Duty Use: The partially threaded design provides a strong, unthreaded shank for added shear strength where it's needed most.
• Regulatory Compliance and Reliability: Meets IFI 115 specifications and is compliant with RoHS 3 and REACH regulations, ensuring material safety and environmental responsibility.
• Versatile Coarse Threading: The 3/4"-10 UNC coarse thread is ideal for quick assembly and disassembly in a wide range of materials, including castings and thick plates.

Professional Applications & Engineering Value

This 12-point flanged screw is engineered to solve critical fastening challenges in heavy machinery, structural steelwork, and high-vibration environments. The alloy steel construction provides the necessary 170,000 psi tensile strength to handle dynamic and static loads without failure. The external 12-point drive offers superior torque transfer, minimizing tool slippage and head stripping during high-stress installations. The integrated flange acts as a built-in washer, providing a larger bearing surface that helps prevent surface damage and maintains clamp load integrity under thermal cycling and vibration. The UNC coarse threading with a Class 3A fit ensures quick, deep engagement in coarse-grained materials, reducing assembly time while providing a secure, vibration-resistant connection that is crucial for industrial safety and equipment longevity.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, featuring a 3/4"-10 UNC thread with a Class 3A thread fit for high precision. It is manufactured in compliance with IFI 115 specifications. The product is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.