S-91301A029 1/4"-20 x 1/8" Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments.
• Exceptional holding power from Class 3A thread fit, ensuring secure fastening with minimal risk of loosening.
• High-strength durability thanks to alloy steel construction and Rockwell C45 hardness, resisting deformation under heavy loads.
• Easy installation and removal with a 1/8" hex drive, allowing for efficient assembly in confined spaces.
• Reliable coarse thread engagement with UNC 1/4"-20 threading, providing quick and strong connections in various materials.
• Compact, headless design ideal for applications where a flush surface is required without protruding components.
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries.

Professional Applications & Engineering Value

This 1/4"-20 UNC Class 3A set screw is engineered to address common industrial challenges such as component slippage and corrosion-induced failure. Made from black-oxide alloy steel, it offers enhanced resistance to rust and wear, making it suitable for machinery, automotive assemblies, and precision equipment where durability is critical. The coarse thread spacing and right-hand threading facilitate quick installation and provide a strong grip, reducing assembly time while maintaining high holding power. Its headless hex drive design allows for seamless integration in tight spaces, ensuring a flush finish that prevents interference in dynamic applications. Ideal for industrial set screws needs, this fastener delivers reliable performance in demanding environments, from manufacturing to maintenance operations.

Specification Summary & Compliance

This set screw adheres to precise specifications, including a 1/4"-20 UNC thread size with Class 3A thread fit for tight tolerances and optimal performance. It features a coarse thread spacing and right-hand thread direction, manufactured from alloy steel with a Rockwell C45 hardness for strength and durability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.