S-90298A154 8-32 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ideal for harsh industrial environments.
• Precise alignment and smooth rotation ensured by the 3/16" diameter shoulder with tight tolerances (±0.001").
• High-strength, reliable fastening with Class 3A thread fit for secure connections in demanding applications.
• Easy installation and removal using the standard hex socket drive, reducing assembly time and tool wear.
• Durable coarse UNC thread (8-32) provides excellent grip and resistance to vibration loosening.
• Compliance with industry standards including ASME B18.3, ensuring consistent quality and interchangeability.
• Environmentally safe and compliant with RoHS 3 and REACH regulations, supporting sustainable manufacturing practices.

Professional Applications & Engineering Value

This stainless steel shoulder screw is engineered to address critical alignment and durability challenges in machinery, automation, and precision equipment. The 18-8 stainless steel material, combined with a passivated finish, offers exceptional resistance to corrosion and wear, extending service life in humid or chemically aggressive settings. The 3/16" shoulder length and precise diameter tolerances provide a stable pivot or spacer, minimizing misalignment and reducing wear on moving parts. With a Class 3A thread fit and coarse UNC thread, it ensures quick assembly and reliable performance in high-vibration environments, making it ideal for applications like robotic arms, conveyor systems, and electronic enclosures where precision and reliability are paramount.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit with 8-32 UNC coarse threads and a shoulder diameter tolerance of -0.001" to 0.001". It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory standards for environmental safety.