S-92981A309 M8 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional durability and corrosion resistance with black oxide finish, ideal for harsh industrial environments
• High tensile strength of 140,000 psi ensures reliable performance under heavy loads and vibration
• Precise shoulder diameter and length tolerances provide accurate alignment and smooth rotation in assemblies
• Class 5g6g thread fit guarantees secure fastening with minimal play in demanding applications
• Socket head with hex drive design allows for easy installation and removal in confined spaces
• Rockwell C32 hardness maintains structural integrity and resists wear over extended use
• Compliance with ISO 7379 and environmental regulations ensures quality and safety for global industrial use

Professional Applications & Engineering Value

This M8 shoulder screw with 1.25mm coarse thread pitch is engineered from alloy steel to address critical challenges in machinery assembly, such as misalignment and component wear. The black oxide finish enhances corrosion resistance, extending service life in humid or abrasive conditions. Its 70mm shoulder length with tight tolerances ensures precise bearing surfaces for rotating parts, reducing friction and maintenance needs in industrial applications like conveyor systems, automotive fixtures, and robotic arms. By combining high tensile strength and standardized metric thread design, it delivers reliable performance where vibration resistance and dimensional accuracy are paramount.

Specification Summary & Compliance

This shoulder screw adheres to ISO 7379 standards, with a Class 5g6g thread fit for consistent engagement. Dimensions include a shoulder diameter tolerance of -0.072 to -0.01 mm and shoulder length tolerance of 0 to 0.25 mm, ensuring precision in manufacturing. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable industrial use.