S-92785A541 1/4"-28 x 3/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Maximum holding power achieved through Class 3A thread fit, ensuring vibration-resistant fastening
• Precise component positioning with 90° cone point tip that digs into shafts for secure locking
• Easy installation in confined spaces using the 1/8" hex drive headless design
• Reliable performance in fine-thread applications with UNF 1/4"-28 thread spacing
• Consistent mechanical properties maintained through Rockwell B80 hardness rating
• Global compliance assurance meeting ASME B18.3 standards and environmental regulations

Professional Applications & Engineering Value

This 1/4"-28 UNF Class 3A set screw delivers exceptional engineering value in applications requiring precise component positioning and vibration resistance. The 18-8 stainless steel construction provides excellent corrosion resistance for machinery operating in demanding environments, while the fine thread spacing ensures superior holding power compared to coarse-thread alternatives. The 90° cone point tip creates positive engagement with shaft materials, preventing slippage in high-torque applications. The headless design with hex drive allows for flush mounting in space-constrained assemblies, making it ideal for precision equipment, automotive components, and industrial machinery where reliable, long-term fastening solutions are critical. These set screws solve common engineering challenges of component creep and loosening under dynamic loads.

Specification Summary & Compliance

This precision fastener features Class 3A thread fit for tight tolerance applications, manufactured to ASME B18.3 specifications for dimensional accuracy and performance reliability. The UNF 1/4"-28 fine thread configuration ensures optimal engagement in precision assemblies. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, this set screw meets international standards for industrial use while maintaining Rockwell B80 hardness for consistent mechanical performance across production batches.