S-90291A881 1/2"-20 ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant fastening with durable nylon tip that prevents loosening under dynamic loads
• Superior corrosion resistance from 18-8 stainless steel construction for long-term reliability in harsh environments
• Precise thread engagement with Class 3A fit ensuring tight tolerances and secure connections
• Easy installation and removal with 1/4" hex drive providing positive torque control
• Wide temperature compatibility with nylon tip performing from -50° to 250°F
• Surface protection with non-marring nylon tip that prevents damage to mating components
• Industry compliance meeting ASME B18.3 specifications for reliable performance

Professional Applications & Engineering Value

This 18-8 stainless steel set screw with nylon tip addresses critical vibration-induced loosening challenges in industrial assemblies. The UNF fine thread configuration with Class 3A fit provides exceptional holding power while the hex headless design allows for flush mounting in confined spaces. Engineered for precision machinery, automotive components, and electronic enclosures, the corrosion-resistant stainless steel body combined with the non-marring nylon tip ensures both component protection and reliable fastening. The 1/4" hex drive facilitates efficient installation in high-volume production environments while maintaining consistent torque application.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision tolerance. Features 1/2"-20 UNF fine threads with right-hand direction and 0.5" thread diameter. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The nylon tip meets temperature requirements from -50° to 250°F while the 18-8 stainless steel maintains Rockwell B80 hardness for durable performance.