S-90833A131 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Crafted from high-strength alloy steel with a black oxide finish, this screw offers superior protection against wear and environmental factors, ensuring long-term reliability in demanding applications.
• Precise Shoulder Alignment: Features a 10mm shoulder diameter with a tight tolerance of -0.072 to -0.01 mm, providing exact positioning for components like bearings or pulleys, reducing assembly errors and improving machine performance.
• Superior Grip & Easy Installation: The knurled low-profile socket head and 5 mm hex drive allow for secure tool engagement and effortless tightening, even in confined spaces, minimizing slippage and speeding up assembly.
• High Load-Bearing Capacity: With a tensile strength of 140,000 psi and Rockwell C30 hardness, this screw withstands heavy mechanical stresses, making it ideal for high-torque and vibration-prone environments.
• Reliable Thread Engagement: The M8x1.25 coarse right-hand thread with Class 5g6g fit ensures quick, secure fastening and consistent performance, reducing the risk of cross-threading in industrial assemblies.
• Regulatory Compliance & Safety: Fully compliant with RoHS 3 and REACH regulations, this screw meets strict environmental and safety standards, supporting sustainable and hazard-free manufacturing processes.
• Optimized Shoulder Design: A 20mm shoulder length with minimal tolerance (0 to 0.25 mm) provides stable support for rotating parts, enhancing alignment and reducing wear in precision machinery.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address common industrial challenges, such as misalignment and component wear in rotating assemblies. Made from alloy steel with a black oxide finish, it resists corrosion and extends service life in harsh conditions like automotive or machinery systems. The low-profile socket head with knurling ensures a firm grip, preventing tool slip during installation in tight spaces. Its precise 10mm shoulder diameter and 20mm shoulder length provide accurate positioning for bearings, gears, or linkages, reducing vibration and improving overall assembly integrity. Ideal for applications in robotics, conveyor systems, and precision equipment, this metric shoulder screw delivers reliable performance, minimizing downtime and maintenance costs while adhering to RoHS and REACH compliance for eco-friendly operations.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 5g6g thread fit for metric threads, ensuring accurate tolerance and compatibility. The shoulder diameter tolerance is -0.072 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, supporting high-precision engineering requirements. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for industrial use.