S-90298A870 3/4"-10 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.
• Precise alignment and secure positioning thanks to the 1" shoulder length with tight ±0.001" diameter tolerance.
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
• Reliable, high-precision threading with Class 3A UNC coarse threads ensuring secure, vibration-resistant fastening.
• Easy installation and removal using the 1/2" hex drive and knurled head for improved grip and torque application.
• Guaranteed dimensional consistency and interchangeability as it meets the rigorous ASME B18.3 standard.
• Safe for sensitive applications with compliance to RoHS 3 and REACH environmental regulations.

Professional Applications & Engineering Value

This shoulder screw is engineered to solve critical alignment and pivot point challenges in precision machinery, automation systems, and heavy-duty assemblies. The 18-8 Stainless Steel construction, combined with a passivated finish, provides excellent resistance to rust and chemical exposure, extending service life in demanding conditions. The 1" shoulder with minimal diameter tolerance acts as a precise locating dowel, reducing component misalignment and wear. The Class 3A UNC coarse thread and 1/2" hex drive ensure quick, secure fastening even in high-vibration environments, making it a reliable choice for industrial fasteners in robotics, conveyor systems, and fixture design.

Specification Summary & Compliance

This shoulder screw features 3/4"-10 UNC Class 3A threads with coarse spacing, a shoulder diameter tolerance of -0.001" to 0.001", and a shoulder length tolerance of -0.005" to 0.005". It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and material quality.