S-90291A305 1/4"-28 ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with a durable green nylon 6/6 plastic tip that prevents loosening under dynamic loads
• Excellent corrosion resistance provided by 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise thread engagement with Class 3A UNF fine threads ensuring reliable, secure fastening in critical applications
• Easy installation and removal using the 1/8" hex drive, allowing for efficient assembly in confined spaces
• Broad temperature compatibility with a nylon tip rated from -50° to 250°F, maintaining performance in varied conditions
• High mechanical strength backed by Rockwell B80 hardness, offering durability and resistance to wear
• Regulatory compliance assurance meeting ASME B18.3 standards, RoHS 3, and REACH for safe, reliable use

Professional Applications & Engineering Value

This 1/4"-28 UNF Class 3A nylon tip set screw is engineered to address common industrial challenges such as component slippage and vibration-induced failures. Made from 18-8 stainless steel, it resists corrosion in demanding environments like machinery, automotive assemblies, and electronic enclosures. The fine thread design and Class 3A fit provide tight tolerances for precise alignment, while the green nylon tip absorbs shocks and prevents damage to mating surfaces. Its headless and hex drive configuration allows for flush mounting in space-constrained applications, ensuring reliable performance in vibration-resistant setups where loosening could lead to operational downtime.

Specification Summary & Compliance

This set screw features a 1/4"-28 UNF fine thread with Class 3A precision fit for high accuracy. It complies with ASME B18.3 manufacturing standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence in industrial use.