S-95289A125 8-32 x 1/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with Class 3A thread fit for precise, secure fastening in demanding applications
• Superior corrosion resistance and durability thanks to Black Oxide finish on high-strength Alloy Steel
• Enhanced grip and anti-loosening performance from the extended tip design for reliable long-term connections
• High torque capability and wear resistance with Rockwell C45 hardness for repeated use in industrial settings
• Easy installation and removal using a standard 5/64" hex key, compatible with common tools
• Optimized for high-vibration environments with coarse UNC threads and right-hand direction for stable performance
• Headless design allows for flush mounting in space-constrained assemblies

Professional Applications & Engineering Value

This 8-32 UNC set screw is engineered to solve critical challenges in industrial machinery, automotive components, and precision equipment. The Black Oxide Alloy Steel construction provides excellent resistance to rust and wear, extending service life in harsh conditions. Its Class 3A thread fit ensures minimal backlash and precise alignment, reducing the risk of assembly errors and component slippage. The extended tip bites deeply into shafts or hubs, preventing rotational movement under high torque or vibration. Ideal for securing gears, pulleys, and collars, this headless set screw offers a reliable, low-profile fastening solution that meets the rigorous demands of heavy-duty applications.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, ensuring dimensional accuracy and performance reliability. Threads are UNC coarse with a Class 3A fit for superior tolerance control. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial use. Tip dimensions include a length of 0.086" (-0.005" to 0" tolerance) and diameter of 0.109" (-0.006" to 0" tolerance), guaranteeing consistent engagement and holding strength.