S-92981A300 M8 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Black oxide finish on alloy steel provides superior protection against rust and wear in demanding industrial environments.
• High Tensile & Shear Strength: With a tensile strength of 140,000 psi and minimum shear strength of 84,000 psi, this screw ensures reliable performance under high-stress conditions.
• Precision Shoulder for Accurate Alignment: The 10mm diameter shoulder with tight tolerance (-0.072 to -0.01 mm) guarantees exact component positioning and reduces assembly errors.
• Secure & Easy Installation: The knurled socket head with 5mm hex drive offers excellent grip and torque transmission, preventing tool slippage during fastening.
• Industry Standard Compliance: Meets ISO 7379 specifications and is RoHS 3 & REACH compliant, ensuring safety and regulatory adherence for global supply chains.
• Optimized Thread Design: M8x1.25mm coarse pitch threads with Class 5g6g fit enable quick assembly and high vibration resistance in machinery applications.
• Consistent Hardness for Longevity: Rockwell C32 hardness ensures the screw maintains its structural integrity and thread form over repeated use cycles.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. The alloy steel construction, combined with a black oxide finish, offers exceptional resistance to corrosion and mechanical stress, making it ideal for automotive, aerospace, and industrial machinery where component misalignment can lead to operational failures. The knurled socket head and hex drive design facilitate secure tightening in confined spaces, while the precisely machined shoulder acts as a pivot or spacer, ensuring accurate axial positioning of parts like gears, bearings, and linkages. By integrating a coarse pitch metric thread (M8x1.25mm), it allows for rapid installation and enhanced vibration resistance, reducing maintenance downtime and improving overall system reliability in high-cycle applications.

Specification Summary & Compliance

This shoulder screw adheres to ISO 7379 standards, with threads manufactured to Class 5g6g fit for precise engagement and tolerance. Key dimensions include a shoulder diameter of 10 mm (tolerance: -0.072 to -0.01 mm) and shoulder length of 12 mm (tolerance: 0 to 0.25 mm), ensuring consistent performance in precision assemblies. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing the absence of hazardous substances for safe use in various industrial sectors.