S-91385A194 8-32 x 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with factory-applied Nylon Patch thread locker that eliminates the need for separate locking compounds.
• Superior corrosion protection from the Black-Oxide finish on Alloy Steel, enhancing durability in demanding environments.
• High-strength, reliable fastening ensured by a Rockwell C45 hardness and a precision-machined UNC Class 3A thread fit.
• Secure installation in confined spaces due to the headless design and compact 5/64" hex drive.
• Wide operational temperature range from -50°F to 250°F, maintaining locking performance in extreme conditions.
• Optimized for high-load applications with a coarse thread and cup tip design for maximum grip and resistance to loosening.
• Guaranteed dimensional consistency and interchangeability, manufactured to meet ASME B18.3 specifications.

Professional Applications & Engineering Value

This 8-32 UNC Class 3A set screw is engineered to solve critical challenges in precision assembly and machinery. The Black-Oxide Alloy Steel construction provides a robust base that resists wear and environmental degradation, while the permanent Nylon Patch thread locker is integral to preventing spontaneous loosening under continuous vibration—a common failure point in motors, gearboxes, and rotating equipment. Its headless hex drive and cup tip allow for flush mounting and concentrated clamping force, making it ideal for securing collars, pulleys, and knobs on shafts without protruding hardware. By combining a coarse thread for rapid installation and a Class 3A fit for tight tolerances, this component delivers reliable performance in automated systems and high-stress industrial applications, reducing maintenance needs and downtime.

Specification Summary & Compliance

This set screw adheres to a Class 3A thread fit for superior dimensional accuracy and is manufactured in accordance with ASME B18.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances. The product meets the defined standards for material, threading (UNC, 8-32, right-hand, coarse spacing), and performance, guaranteeing consistency and reliability in professional use.