S-90298A872 3/4"-10 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel and passivated finish for long-term reliability in harsh environments.
• Precise component alignment ensured by the 1" diameter shoulder with tight tolerance (-0.001" to 0.001") for reduced assembly errors.
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness to withstand heavy-duty mechanical loads.
• Secure, non-slip fastening via the knurled head and 1/2" hex drive, allowing for high-torque installation without tool slippage.
• Reliable thread engagement with Class 3A UNC coarse threads, providing superior fit and vibration resistance in dynamic applications.
• Broad industrial compliance meeting ASME B18.3 specifications, RoHS 3, and REACH standards for safe, regulated use.
• Versatile right-hand threading designed for standard assembly processes, ensuring compatibility with common machinery and equipment.

Professional Applications & Engineering Value

This stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 18-8 stainless steel construction, combined with a passivated finish, provides excellent resistance to corrosion and wear, making it ideal for applications in machinery, automotive assemblies, and precision equipment where exposure to moisture or chemicals is common. The 1" shoulder diameter with minimal tolerance ensures precise location of rotating parts, reducing wear on components and minimizing maintenance downtime. With a coarse UNC thread and Class 3A fit, it offers quick assembly and reliable performance under high-stress conditions, while the knurled head and hex drive enable secure handling during installation. This screw delivers consistent value in industrial shoulder bolt applications by enhancing operational efficiency and product lifespan.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit and UNC coarse thread standards with precise dimensional controls, including shoulder diameter tolerance of -0.001" to 0.001" and shoulder length tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, ensuring environmental safety and industry-standard reliability.