S-94564A253 4-40 x 5/8" Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with durable Nylon Plastic construction, ideal for harsh environments without rust or degradation.
• Precise and reliable fastening ensured by Class 2A thread fit and UNC coarse threads, reducing the risk of loosening in vibration-prone applications.
• Easy installation and removal with a 3/64" hex drive, allowing for secure tool engagement in tight spaces without head interference.
• Wide temperature tolerance from -40° to 185°F, maintaining performance in diverse industrial settings without material failure.
• Environmentally compliant and safe with RoHS 3 adherence, meeting strict regulations for hazardous substance-free use in manufacturing.
• Secure component positioning thanks to the flat tip design, providing consistent clamping force without damaging softer materials.
• Lightweight and non-conductive properties of nylon, reducing overall assembly weight and preventing electrical interference.

Professional Applications & Engineering Value

This 4-40 UNC set screw is engineered to address common industrial challenges, such as component slippage and corrosion in precision assemblies. Made from Nylon Plastic, it offers excellent chemical and moisture resistance, making it suitable for electronics, automotive, and machinery where metal fasteners may cause galvanic corrosion or add unnecessary weight. The headless hex drive design allows for flush mounting in confined spaces, while the coarse thread spacing and Class 2A thread fit ensure quick installation and reliable holding power in high-vibration environments. Its flat tip provides uniform pressure, preventing damage to shafts or gears, and the right-hand thread direction supports standard assembly processes. Ideal for securing knobs, pulleys, and other mechanical parts, this screw enhances durability and simplifies maintenance in industrial fastening applications.

Specification Summary & Compliance

This set screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy and ease of assembly. It meets RoHS 3 (2015/863/EU) compliance, ensuring it is free from hazardous substances, and is manufactured to precise specifications including a 5/8" length, 4-40 thread size, and coarse thread spacing. The temperature range of -40° to 185°F and off-white color provide additional quality assurance for various industrial uses.