S-92311A190 8-32 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for humid or chemically aggressive environments
• Exceptional thread precision and holding power from UNC Class 3A fit, ensuring reliable, vibration-resistant fastening
• High-strength durability with Rockwell B80 hardness, providing excellent resistance to wear and deformation
• Secure, flush installation via headless hex drive design, preventing protrusion and allowing use in confined spaces
• Effective grip and minimal surface damage from the cup tip, which concentrates clamping force for secure component positioning
• Wide compatibility and easy installation with coarse UNC 8-32 threads and standard 5/64" hex drive, reducing assembly time
• Compliance with rigorous industry and environmental standards, including ASME B18.3, RoHS, and REACH, ensuring safety and regulatory acceptance

Professional Applications & Engineering Value

This 8-32 UNC Class 3A set screw is engineered to address critical challenges in precision assembly and machinery. Made from 18-8 stainless steel, it offers outstanding corrosion resistance, making it suitable for applications exposed to moisture, chemicals, or outdoor conditions. The headless design with a hex drive allows for flush mounting, eliminating interference in compact mechanisms while the cup tip ensures firm contact and reduces slippage on shafts or collars. Its coarse thread and Class 3A thread fit provide superior clamping force and vibration resistance, essential for maintaining alignment in motor mounts, pulleys, and robotic arms. Ideal for OEM and MRO use in automotive, aerospace, and industrial equipment, this screw delivers long-term reliability and reduces maintenance needs.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, with precise UNC 8-32 coarse threads and a Class 3A thread fit for tight tolerances and optimal performance. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free of hazardous substances. Additional details include a 1/4" length, 5/64" hex drive, right-hand thread direction, and Rockwell B80 hardness for consistent quality and durability in regulated industries.