S-92981A143 M3 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability and Corrosion Resistance: The black oxide finish on alloy steel provides superior protection against rust and wear, extending the screw's service life in harsh industrial environments.
• High Tensile and Shear Strength: With a 140,000 psi tensile strength and 84,000 psi minimum shear strength, this screw ensures reliable performance under heavy loads and stress.
• Precise Shoulder Positioning: The 4mm shoulder diameter and 12mm shoulder length with tight tolerances allow for accurate alignment and secure component mounting.
• Easy Installation with Hex Drive: The 2mm hex drive and socket head design facilitate quick, tool-friendly assembly and disassembly, reducing labor time.
• Consistent Thread Performance: Class 5g6g thread fit and coarse M3x0.5 metric thread ensure smooth engagement and reduced risk of cross-threading in repetitive applications.
• Compliance with International Standards: Meets ISO 7379 specifications, ensuring dimensional accuracy and interoperability in global machinery and equipment.
• Environmentally Safe and Reliable: RoHS 3 and REACH compliant, making it suitable for use in regulated industries without hazardous substance concerns.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address common challenges in precision assembly, such as misalignment and component slippage. The alloy steel construction, hardened to Rockwell C32, provides excellent resistance to deformation under load, while the black oxide finish enhances corrosion resistance in moist or chemically exposed settings. The shoulder design with a 4mm diameter and 12mm length acts as a precise spacer or pivot point, ideal for applications in robotics, automotive systems, and electronic enclosures where exact positioning is critical. The hex drive and right-hand metric thread enable efficient installation in tight spaces, reducing assembly errors and maintenance downtime. By integrating high-strength materials and standardized thread specifications, this screw delivers reliable performance in dynamic industrial environments, ensuring long-term operational stability.

Specification Summary & Compliance

This shoulder screw features precise dimensional tolerances, including a shoulder diameter tolerance of -0.072 to -0.01 mm and shoulder length tolerance of 0 to 0.25 mm, ensuring consistent fit in metric applications. The thread fit adheres to Class 5g6g standards, providing reliable engagement, while manufacturing complies with ISO 7379 for quality assurance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industrial use.