S-90298A832 5/8"-11 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.
• Exceptional tensile strength of 70,000 psi ensures reliable performance under high-stress applications.
• Precise shoulder fitting with tight diameter tolerance (±0.001") and length tolerance (±0.005") for accurate alignment.
• Class 3A thread fit provides secure, vibration-resistant fastening in demanding assemblies.
• Easy installation and removal with hex drive and knurled head for improved grip and torque application.
• Compliance with ASME B18.3 standards guarantees consistent quality and interchangeability.
• RoHS and REACH compliant for safe use in regulated industries and global markets.

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The 18-8 stainless steel construction, combined with a passivated finish, offers excellent resistance to corrosion and wear, extending service life in humid or chemically aggressive settings. The 3/4" shoulder diameter with minimal tolerances ensures precise component positioning, reducing misalignment and wear in rotating assemblies like bearings, pulleys, and gears. With a coarse thread and Class 3A fit, it provides robust clamping force and vibration resistance, making it ideal for heavy-duty applications in automotive, aerospace, and manufacturing equipment where reliability is paramount.

Specification Summary & Compliance

This shoulder screw features a 5/8"-11 UNC thread with Class 3A fit for high precision, a shoulder diameter of 3/4" with tolerance from -0.001" to 0.001", and shoulder length of 1/2" with tolerance from -0.005" to 0.005". It meets ASME B18.3 specifications for dimensional consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.