S-90323A489 M8 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 alignment and reduced wear due to the accurately machined shoulder with tight diameter and length tolerances for stable component positioning.
• High strength and durability offering 80,000 psi tensile strength and Rockwell B95 hardness for reliable performance under heavy loads.
• Space-saving low-profile socket head with 5mm hex drive for easy installation in confined spaces without compromising torque application.
• Consistent thread engagement with Class 6g thread fit and coarse M8x1.25 pitch, facilitating quick assembly and reducing cross-threading risks.
• Compliance with environmental standards including RoHS 3 and REACH, making it safe for use in regulated industries worldwide.
• Smooth head texture minimizes friction and damage to mating surfaces during installation and operation.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address common challenges in precision machinery, such as misalignment and component slippage. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to rust and chemicals, ideal for applications in automotive, aerospace, and electronics where environmental factors are a concern. The low-profile socket head with a 5mm hex drive allows for efficient torque transmission in tight spaces, while the precisely toleranced shoulder ensures accurate alignment of moving parts, reducing wear and maintenance costs. Its Class 6g thread fit and coarse 1.25mm pitch enable fast, secure fastening in high-vibration settings, making it a reliable choice for assembly lines and robotic systems that demand repeatable performance.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with an M8 thread size, 1.25mm pitch, and Class 6g thread fit for consistent dimensional accuracy. The shoulder features precise tolerances: diameter of 10 mm (-0.025 to 0 mm) and length of 25 mm (0 to 0.05 mm). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.