S-90289A532 1/4"-20 x 3/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for precise, vibration-resistant fastening in critical assemblies
• Enhanced corrosion resistance from black-oxide coating, extending service life in harsh industrial environments
• High mechanical strength due to alloy steel construction and Rockwell C45 hardness, preventing deformation under heavy loads
• Secure installation and removal with 1/8" hex drive, allowing high torque application without head interference
• Effective material penetration from cup tip design, creating reliable locking contact on shafts and components
• Broad compatibility with UNC coarse 1/4"-20 threading, ensuring easy integration into standard industrial equipment
• Regulatory confidence through compliance with ASME B18.3, RoHS 3, and REACH for safe, global usage

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional reliability in demanding mechanical systems where vibration resistance and corrosion protection are critical. The headless design with hex drive enables flush mounting in confined spaces, while the UNC coarse thread and Class 3A fit provide superior clamping force for shaft collars, gears, and pulleys. Its cup tip bites securely into materials, preventing slippage in high-torque applications. Engineered to meet ASME B18.3 standards, it ensures consistent performance in industrial machinery, automotive assemblies, and heavy equipment, reducing maintenance needs and downtime.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for tight tolerances and reliable engagement. The 1/4"-20 UNC coarse thread and right-hand direction adhere to industry standards. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global acceptability.