S-90298A849 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring longevity in harsh industrial environments.
• Precise component alignment thanks to the 3 1/2" shoulder with a tight ±0.001" diameter tolerance, reducing assembly errors and wear.
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness, providing reliable load-bearing capacity for demanding applications.
• Secure and efficient installation using the 3/8" hex drive and knurled head, offering superior grip and torque transmission without slippage.
• Accurate and durable threading with 5/8"-11 UNC Class 3A coarse threads, ensuring consistent fit and resistance to vibration loosening.
• Compliance with industry standards including ASME B18.3, RoHS, and REACH, guaranteeing safety, quality, and environmental responsibility.
• Versatile right-hand thread design for easy integration into various machinery and equipment, streamlining maintenance and repairs.

Professional Applications & Engineering Value

This stainless steel shoulder screw is engineered to address critical challenges in precision assembly and heavy-duty operations. The 18-8 stainless steel material combined with a passivated finish provides excellent resistance to corrosion and oxidation, making it ideal for use in demanding industrial environments like automotive manufacturing, robotics, and conveyor systems. The 3 1/2" shoulder length with minimal tolerance ensures precise alignment of moving parts, reducing friction and extending component life. Its 5/8"-11 UNC Class 3A thread offers reliable fastening in high-vibration settings, while the socket head with hex drive allows for easy installation in confined spaces. By integrating high tensile strength and Rockwell B55 hardness, this shoulder screw delivers consistent performance in applications requiring durability and precision, such as pivots, axles, and bearing supports.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit and UNC coarse thread standards for precise dimensional accuracy. It meets ASME B18.3 specifications for manufacturing consistency, with shoulder diameter tolerance of -0.001" to 0.001" and shoulder length tolerance of -0.005" to 0.005". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use.