S-92505A775 1/2"-20 x 2 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black oxide coating for extended service life in demanding industrial environments
• Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash in critical applications
• Extended tip design provides enhanced grip and seating in mating components for reliable positioning
• High-strength alloy steel construction with Rockwell C45 hardness maintains structural integrity under heavy loads
• 1/4" hex drive compatibility allows for standard tooling and efficient installation in confined spaces
• Fine thread spacing delivers superior vibration resistance and improved clamping force distribution
• Headless configuration enables flush mounting where protruding fasteners are not permissible

Professional Applications & Engineering Value

Engineered for precision positioning and secure component retention, this black oxide alloy steel set screw addresses critical challenges in industrial machinery, automotive assemblies, and precision equipment. The extended tip design penetrates deeper into mating surfaces, creating positive engagement that resists loosening under vibration and dynamic loads. The Class 3A UNF fine threads provide superior holding power in soft materials and thin-walled applications where standard threads might strip. With Rockwell C45 hardness, these hex drive set screws maintain dimensional stability in high-stress applications while the corrosion-resistant black oxide finish ensures long-term reliability in harsh operating conditions. The headless configuration makes them ideal for rotating components, shaft collars, and applications requiring flush mounting surfaces.

Specification Summary & Compliance

This 1/2"-20 UNF set screw features precision Class 3A thread fit with fine thread spacing, manufactured to ASME B18.3 specifications (ASTM F912). The extended tip maintains tight dimensional tolerances (tip diameter: 0.343" [-0.009" to 0"], tip length: 0.13" [-0.005" to 0"]) for consistent performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe use across global markets.