S-92311A419 1"-8 x 4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 Stainless Steel construction, ensuring long-term reliability in harsh environments.
• Superior holding power and vibration resistance achieved with a Class 3A thread fit and coarse UNC thread spacing for maximum grip.
• High-strength performance with a Rockwell B80 hardness rating, providing excellent durability and resistance to wear.
• Secure and flush installation enabled by the headless design and 9/16" hex drive, ideal for confined spaces.
• Enhanced component retention from the cup tip design, which bites into surfaces to prevent loosening under stress.
• Broad industrial compliance meeting ASME B18.3 standards, RoHS 3, and REACH regulations for safe, reliable use.
• Right-hand thread direction for standard, efficient installation and removal in common applications.

Professional Applications & Engineering Value

This 1"-8 UNC Class 3A set screw is engineered for demanding industrial applications where precision and reliability are critical. Made from 18-8 Stainless Steel, it resists corrosion and oxidation, making it ideal for machinery, automotive assemblies, and outdoor equipment exposed to moisture or chemicals. The headless hex drive and coarse thread spacing ensure easy installation with standard tools, while the cup tip provides a firm grip on shafts, pulleys, and collars, preventing slippage and maintaining alignment under high torque or vibration. Its Rockwell B80 hardness offers robust performance in heavy-duty settings, reducing the risk of stripping or failure. By adhering to ASME B18.3 specifications, this screw delivers consistent quality for engineers and procurement specialists seeking durable, compliant fastening solutions.

Specification Summary & Compliance

This set screw features a 1"-8 UNC coarse thread with a Class 3A thread fit for precise, tight tolerances, ensuring reliable engagement in industrial assemblies. It complies with ASME B18.3 manufacturing standards for dimensional accuracy and performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substance restrictions.