S-90298A551 10-24 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.
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity and long-term durability in demanding applications.
• Precision Class 3A thread fit with 10-24 UNC coarse thread for secure, vibration-resistant fastening and easy assembly.
• Knurled head and hex socket drive provide excellent grip and torque transmission, reducing installation time and tool slippage.
• Accurate shoulder dimensions with tight tolerances (e.g., shoulder diameter ±0.001") for consistent alignment and reduced play in assemblies.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards for global industrial use.
• Rockwell B55 hardness offers excellent wear resistance, maintaining performance under repeated stress.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The 10-24 UNC coarse thread and Class 3A fit ensure quick, secure fastening in machinery, automotive, and electronics assemblies, minimizing loosening from vibrations. The passivated finish enhances corrosion resistance, extending service life in humid or chemical-exposed environments. With a 3/8" shoulder length and precise shoulder diameter, it provides stable pivoting and spacing in rotating parts, reducing wear and maintenance costs. Ideal for use in precision instruments, conveyor systems, and robotic arms, this fastener delivers reliable performance where accuracy and durability are critical.

Specification Summary & Compliance

This shoulder screw features a 10-24 UNC coarse thread with Class 3A fit for high precision, and shoulder dimensions include a diameter of 1/4" (tolerance: -0.001" to 0.001") and length of 3/8" (tolerance: -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 it is free from hazardous substances and suitable for environmentally conscious industrial applications.