S-92505A633 1/4"-28 x 1/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit ensuring tight, secure connections in demanding applications
• Enhanced corrosion resistance from black oxide coating on alloy steel, extending service life in harsh industrial environments
• Maximum torque transmission through 1/8" hex drive design, preventing stripping during installation
• Exceptional material strength with Rockwell C45 hardness for reliable performance under heavy loads
• Improved grip and alignment from extended tip design, reducing component slippage and misalignment
• Precision UNF fine threads (1/4"-28) providing superior engagement and vibration resistance
• Space-saving headless configuration allowing flush mounting where clearance is limited

Professional Applications & Engineering Value

These black oxide alloy steel set screws deliver critical performance in precision assemblies where vibration resistance and secure positioning are paramount. The extended tip design creates deeper penetration into mating components, effectively preventing rotational slippage in pulleys, gears, and collars. Engineered with UNF fine threads and Class 3A fit, they maintain clamping force under dynamic loads while the headless configuration enables clean, unobtrusive installations. The Rockwell C45 hardness ensures the hex drive withstands repeated torque applications without deformation, making these set screws ideal for manufacturing equipment, automotive systems, and precision machinery where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with precision Class 3A thread fit and UNF 1/4"-28 fine threads. The extended tip features controlled dimensions with diameter tolerance of -0.007" to 0" and length tolerance of -0.005" to 0". Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.