S-91829A534 10-32 MS51575-18, NASM51575 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments and long-term reliability.
• Enhanced assembly precision due to the Class 2A thread fit and precise shoulder diameter, ensuring accurate alignment and reduced part movement.
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness, providing dependable performance under load.
• Secure and efficient fastening from the 10-32 UNF fine thread and socket head design, allowing for high torque application and a clean aesthetic.
• Guaranteed dimensional consistency with tight shoulder length and diameter tolerances, facilitating repeatable and reliable installations.
• Compliance with stringent industry standards including MS51575-18, ensuring product quality and interchangeability in professional applications.
• Environmentally responsible manufacturing as it is RoHS 3 and REACH compliant, meeting global regulatory requirements.

Professional Applications & Engineering Value

This stainless steel shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel material combined with a passivated finish offers excellent resistance to corrosion and oxidation, making it suitable for use in machinery, automotive, and electronic enclosures where environmental factors are a concern. The 10-32 UNF fine thread and 1/4" shoulder length provide a secure fit for components that require precise pivoting, locating, or spacing—such as in gears, linkages, and bearing mounts. Its socket head design allows for easy installation in confined spaces, reducing assembly time while maintaining a high-strength connection. By ensuring minimal backlash and consistent performance, this screw enhances the longevity and reliability of your industrial applications.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit tolerances and is manufactured in accordance with MS51575-18 (NASM51575) specifications. Key dimensional attributes include a shoulder diameter of 1/4" with a tolerance of -0.001" to 0", and a shoulder length of 1/4" with a tolerance of 0" to 0.002" for precise assembly. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for global use.