S-90298A885 3/4"-10 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh industrial environments.
• Exceptional load-bearing capacity thanks to 70,000 psi tensile strength and Rockwell B55 hardness, providing dependable performance under high stress.
• Precise alignment and smooth rotation enabled by the 5" shoulder with tight diameter tolerance (-0.001" to 0.001"), reducing wear in machinery assemblies.
• Easy installation and removal with the 1/2" hex drive and knurled head, offering superior grip and torque application without slippage.
• Reliable thread engagement through Class 3A fit and 3/4"-10 UNC coarse threads, ensuring secure fastening and vibration resistance.
• Broad regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards, guaranteeing safety and environmental responsibility.
• Versatile industrial application due to the right-hand thread and standard socket head profile, suitable for various heavy-duty machinery and equipment.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical challenges in industrial settings, such as misalignment and component wear. The 5" shoulder length with minimal tolerances provides a stable pivot or spacer, essential in assemblies requiring precise rotational movement, like conveyor systems or robotic arms. The Class 3A thread fit and coarse UNC threads enhance vibration resistance, reducing the risk of loosening in high-stress applications. Made from corrosion-resistant material with a passivated finish, it withstands exposure to moisture and chemicals, extending service life in environments like manufacturing plants or outdoor equipment. Its 1/2" hex drive and knurled head facilitate quick maintenance, minimizing downtime. Ideal for use in machinery, automotive, and aerospace sectors, this screw delivers consistent performance where reliability is paramount.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, ensuring dimensional accuracy with a Class 3A thread fit for tight tolerances. The shoulder features a diameter tolerance of -0.001" to 0.001" and length tolerance of -0.005" to 0.005", guaranteeing precise fits in assemblies. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for industrial use worldwide.