S-94105A324 4-40 x 7/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with Class 3A thread fit for secure, vibration-resistant fastening in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
• High-strength durability backed by Rockwell C45 hardness, resisting wear and deformation under heavy loads.
• Secure, flush installation with a headless design and flat tip, ideal for applications where a protruding head is not feasible.
• Easy installation and removal using the 0.050" hex drive, allowing for high torque application with standard tools.
• Reliable performance ensured by compliance with ASME B18.3 standards, guaranteeing consistent quality and dimensional accuracy.
• Broad industrial compatibility with coarse UNC threads and right-hand direction, suitable for a wide range of machinery and equipment.

Professional Applications & Engineering Value

This 4-40 UNC set screw is engineered to address critical challenges in precision assembly and heavy-duty machinery. The black-oxide alloy steel construction provides excellent resistance to rust and oxidation, making it ideal for environments exposed to moisture or chemicals. Its headless design and flat tip ensure a flush fit, preventing interference in compact spaces and enhancing safety. The Class 3A thread fit and coarse thread spacing offer superior grip and vibration resistance, reducing the risk of loosening in dynamic applications such as motor shafts, gears, and pulleys. With a Rockwell C45 hardness, it maintains integrity under high stress, while the hex drive allows for efficient installation with common tools, streamlining maintenance and reducing downtime in industrial settings.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, ensuring precise dimensional accuracy with a Class 3A thread fit for tight tolerances. It features a 4-40 UNC coarse thread with right-hand direction and a length of 7/16". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing it is free from hazardous substances and safe for use in various industrial applications.