S-90298A539 10-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel and passivated finish for long-term reliability in harsh environments
• Precise alignment and smooth rotation ensured by the 5/8" shoulder with tight diameter tolerance of ±0.001"
• High tensile strength of 70,000 psi and Rockwell B55 hardness for heavy-duty applications and reduced failure risk
• Superior thread engagement with Class 3A fit and UNC coarse threads for faster assembly and vibration resistance
• Secure, non-slip installation thanks to the knurled socket head and 1/8" hex drive for enhanced torque application
• Broad industry compliance meeting ASME B18.3 specifications, RoHS 3, and REACH standards for global use
• Optimized for precision machinery with consistent 3/8" thread length and standard shoulder fit for repeatable performance

Professional Applications & Engineering Value

This 10-24 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial assemblies. The 18-8 stainless steel construction, enhanced by a passivated finish, provides excellent resistance to oxidation and chemical exposure, making it ideal for precision equipment, automotive components, and electronic enclosures. The 5/8" shoulder length acts as a reliable pivot or spacer, reducing wear on moving parts and maintaining exact positioning under load. Combined with a Class 3A thread fit and knurled head, it ensures secure fastening in high-vibration environments, streamlining maintenance and improving overall assembly reliability for engineers and OEMs.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 standards, with precise dimensions including a 10-24 UNC thread (Class 3A fit), 3/8" thread length, and shoulder diameter tolerance of -0.001" to 0.001". It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for international markets.