S-90298A555 10-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi minimum shear strength, ensuring reliable performance under high-stress conditions.
• Precise component alignment facilitated by the 3 1/2" shoulder with controlled diameter and length tolerances for consistent assembly.
• Secure and efficient installation using the knurled socket head and 1/8" hex drive, providing excellent grip and torque transmission.
• Reliable thread engagement with Class 3A fit and 10-24 UNC coarse threads, offering vibration resistance and quick assembly.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety.
• Enhanced durability from Rockwell B55 hardness, maintaining integrity through repeated use and handling.

Professional Applications & Engineering Value

This 10-24 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it suitable for applications in machinery, automotive, and electronics where exposure to moisture or chemicals is a concern. The 3 1/2" shoulder length with tight tolerances ensures accurate positioning of moving parts like gears, pulleys, or bearings, reducing wear and misalignment. The knurled socket head and hex drive design allow for secure tool engagement, minimizing slippage during high-torque installation. By combining Class 3A thread fit with coarse UNC threads, this screw offers robust fastening that withstands vibrations and dynamic loads, enhancing the longevity and reliability of industrial equipment.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threads (10-24 size). The shoulder diameter is 1/4" with a tolerance of -0.004" to -0.002", and the shoulder length is 3 1/2" with a tolerance of -0.005" to 0.005". It conforms to ASME B18.3 specifications for consistent manufacturing quality. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for hazardous substance restrictions.