S-92183A521 5/8"-11 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Precise alignment and smooth rotation ensured by the standard shoulder fit and Class 3A thread fit for reduced assembly play.
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for demanding, heavy-duty applications.
• Secure, high-torque installation via the 1/2" hex socket drive and knurled head for improved grip and reduced tool slippage.
• Reliable coarse threading (5/8"-11 UNC) for faster assembly and reduced cross-threading risks in high-vibration settings.
• Durable, long-lasting performance backed by Rockwell B55 hardness, maintaining integrity under repeated stress.
• Compliance with global regulations including RoHS 3 and REACH, ensuring safe use in regulated markets.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy equipment. The Class 3A thread fit and precisely toleranced shoulder diameter minimize radial play, ensuring accurate component alignment in assemblies like rotating shafts, linkages, and bearing mounts. The coarse UNC thread facilitates quick installation and resists loosening under vibration, while the knurled hex socket head allows for high-torque fastening without stripping. Made from corrosion-resistant stainless steel, it withstands exposure to moisture, chemicals, and temperature variations, making it a reliable choice for industrial, automotive, and aerospace applications where high tensile strength and dimensional stability are non-negotiable.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 3A fit for tight tolerance and superior thread engagement. Shoulder diameter tolerance is maintained between -0.004" to -0.002", and shoulder length tolerance from -0.002" to 0.002" to ensure precise fits. The fastener is manufactured in accordance with inch system measurements and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and regulated industries.