S-94564A261 4-40 x 7/8" Set Screws

Key Features & Benefits at a Glance

• Corrosion-resistant nylon construction ensures reliable performance in humid or chemical environments without rust or degradation.
• Lightweight and electrically insulating properties prevent electrical conductivity and reduce overall assembly weight for sensitive applications.
• Wide temperature tolerance from -40° to 185°F maintains structural integrity in varying thermal conditions without cracking or warping.
• Class 2A thread fit with UNC coarse threading provides easy installation and secure holding power for repeated adjustments.
• Headless design with 3/64" hex drive allows flush mounting in tight spaces and tool accessibility for precise torque control.
• Flat tip design delivers consistent surface contact to minimize damage to shafts or components during securing.
• RoHS 3 compliance guarantees environmental safety and meets international regulatory standards for hazardous substance restrictions.

Professional Applications & Engineering Value

This 4-40 UNC nylon plastic set screw is engineered to address common industrial challenges like galvanic corrosion, electrical isolation, and weight reduction in precision assemblies. The off-white nylon material offers excellent resistance to moisture, chemicals, and UV exposure, making it ideal for electronics, medical devices, and outdoor equipment. With its coarse UNC threads and Class 2A fit, it ensures quick installation and reliable clamping force in applications requiring frequent adjustments, such as adjustable knobs, sensor mounts, and lightweight framing. The headless, flat tip configuration prevents protrusion and marring on rotating shafts, while the 3/64" hex drive facilitates secure tightening in confined spaces, enhancing assembly efficiency and longevity.

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. Manufactured in the inch system, it features a 4-40 thread size, 7/8" length, and coarse thread spacing for robust performance. Compliance with RoHS 3 (2015/863/EU) ensures it is free from hazardous substances, supporting safe and sustainable industrial use.