S-90291A407 5/16"-24 ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with a durable Nylon 6/6 plastic tip that maintains grip under dynamic loads
• Excellent corrosion resistance provided by 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise thread engagement with Class 3A fit and UNF fine threads for secure, reliable fastening in critical assemblies
• Broad temperature compatibility with a tip range from -50° to 250°F, ensuring performance in varied operating conditions
• Enhanced durability with Rockwell B80 hardness, offering long service life and resistance to wear
• Secure installation using a 5/32" hex drive, allowing for high torque application without head protrusion
• Surface protection with a soft nylon tip that prevents damage to mating components during tightening

Professional Applications & Engineering Value

This 5/16"-24 UNF Class 3A set screw is engineered to address common industrial challenges such as component slippage and thread wear in high-vibration environments. The 18-8 stainless steel body provides reliable strength and corrosion resistance, while the Nylon 6/6 plastic tip offers consistent clamping force without marring surfaces. Its fine thread design and hex headless configuration make it ideal for precision machinery, automotive assemblies, and electronic enclosures where space is limited and vibration resistance is critical. The right-hand thread and precise Class 3A fit ensure easy installation and secure retention, reducing maintenance needs and improving operational reliability in demanding applications.

Specification Summary & Compliance

This set screw features a 5/16"-24 UNF fine thread with Class 3A precision tolerance for accurate fit. It complies with ASME B18.3 manufacturing standards, ensuring consistent quality and performance. Additionally, the product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.