S-90291A882 1/2"-20 ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with durable green nylon tip that prevents loosening under dynamic loads
• Exceptional corrosion resistance provided by 18-8 stainless steel construction for long service life
• Precise thread engagement with Class 3A fit ensuring reliable fastening in critical applications
• Wide temperature tolerance from -50° to 250°F for stable performance in varying environments
• High mechanical strength with Rockwell B80 hardness for dependable holding power
• Easy installation and removal with 1/4" hex drive design requiring minimal clearance
• Surface protection with soft nylon tip that prevents damage to mating components

Professional Applications & Engineering Value

This 1/2"-20 UNF Class 3A nylon tip set screw delivers exceptional engineering value in demanding industrial applications. The 18-8 stainless steel construction provides excellent corrosion resistance while maintaining Rockwell B80 hardness for reliable performance. The fine UNF threads with Class 3A precision ensure secure fastening in machinery, automotive components, and precision equipment where vibration resistance is critical. The green nylon tip offers superior marring protection for shafts, gears, and collars while maintaining grip under thermal stress from -50° to 250°F. The headless design with 1/4" hex drive allows for installation in confined spaces, making it ideal for set screw applications requiring flush mounting and repeated adjustments.

Specification Summary & Compliance

This precision fastener features 1/2"-20 UNF fine threads with Class 3A thread fit for superior dimensional accuracy. Manufactured in compliance with ASME B18.3 specifications, ensuring consistent quality and performance. The product meets RoHS 3 (2015/863/EU) compliance standards and is REACH (EC 1907/2006) compliant, confirming environmental responsibility and regulatory adherence for industrial applications worldwide.