S-91829A201 8-32 MS51575-6, NASM51575 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Corrosion Resistance: Made from 18-8 Stainless Steel with a passivated finish, this shoulder screw offers superior protection against rust and chemical degradation, ensuring long-term reliability in harsh industrial environments.
• High Tensile Strength and Durability: With a tensile strength of 70,000 psi and Rockwell B55 hardness, it withstands high stress and repetitive loads, reducing the risk of failure and maintenance needs.
• Precise Shoulder Fit for Accurate Alignment: The precisely machined shoulder with tight diameter and length tolerances ensures exact component positioning, minimizing misalignment and improving assembly efficiency.
• Reliable Thread Engagement: Featuring 8-32 UNC coarse threads with Class 2A fit, it provides secure, vibration-resistant fastening that is easy to install and remove, saving time in maintenance and assembly.
• Versatile Socket Head Design: The standard socket head with slotted drive allows for easy access and torque application in confined spaces, enhancing installation flexibility and reducing tool slippage.
• Compliance with Rigorous Standards: Meets MS51575-6 specifications, ensuring consistent quality and performance, while RoHS 3 and REACH compliance supports environmental safety and regulatory adherence.
• Optimized for Right-Hand Thread Applications: The right-hand thread direction facilitates standard installation practices, improving compatibility with common tools and reducing operator errors.

Professional Applications & Engineering Value

This 18-8 Stainless Steel Shoulder Screw is engineered to address critical challenges in precision mechanical assemblies, such as maintaining alignment in rotating components and reducing wear in high-stress applications. The UNC coarse threading and Class 2A thread fit ensure reliable fastening even under vibration, while the passivated finish enhances corrosion resistance for use in demanding environments like aerospace, automotive, and industrial machinery. Its precise shoulder diameter and length provide a stable pivot or spacer, eliminating the need for additional bushings and simplifying design. By integrating MS51575-6 compliance, it guarantees uniformity and strength, making it ideal for applications requiring exact tolerances and durability, such as in robotics, conveyor systems, and precision instruments.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent engagement and UNC coarse threads (8-32 size) with a thread length of 3/16". The shoulder features tight tolerances (diameter: -0.001" to 0"; length: 0" to 0.002") to ensure accurate fit. Manufactured in compliance with MS51575-6 specifications, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility.