S-98057A421 8-32 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life
• Excellent mechanical strength and durability provided by Rockwell B80 hardness, preventing deformation under load
• Secure and reliable fastening ensured by the Class 2A thread fit and UNC coarse thread profile for easy assembly and vibration resistance
• Space-saving headless design allows for flush mounting in applications where protrusion is not permissible
• Simple installation and adjustment with a standard slotted drive, compatible with common hand tools
• Effective point contact and gripping power from the cup tip, minimizing component slippage in assemblies
• Full regulatory compliance with RoHS 3 and REACH, ensuring safety and environmental standards are met for global supply chains

Professional Applications & Engineering Value

This 8-32 UNC set screw in 316 stainless steel is engineered to address critical challenges in industrial settings, such as corrosion from chemicals, moisture, and saline atmospheres. The headless, slotted design provides a low-profile solution for securing collars, gears, and pulleys on shafts without interfering with adjacent components. Its coarse thread spacing and Class 2A fit facilitate quick, precise installation, reducing assembly time while maintaining tight tolerances. The cup tip concentrates pressure for a firm grip, preventing loosening under dynamic loads. Ideal for machinery, automotive, and marine applications, this screw ensures long-term reliability and performance, backed by ASME B18.3 specifications for consistent quality.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent engagement and a UNC thread form with 8-32 size. Manufactured in compliance with ASME B18.3, it ensures interoperability and reliability. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for hazardous substances.