S-92981A055 M4 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: The black oxide finish provides a protective layer, reducing wear and extending service life in demanding industrial environments.
• Superior Strength for High-Stress Applications: Made from alloy steel with a 140,000 psi tensile strength and 84,000 psi minimum shear strength, ensuring reliable performance under heavy loads.
• Precision Alignment and Pivot Function: The 30mm shoulder with controlled diameter tolerance acts as a precise locating dowel or pivot point, reducing component misalignment.
• Secure and Efficient Installation: The internal 2.5 mm hex socket drive allows for high torque application and a clean, flush installation without protruding hardware.
• Reliable Thread Engagement: Class 5g6g thread fit on the M4 x 0.7mm coarse pitch metric thread ensures consistent, secure fastening and easy assembly.
• Consistent Hardness for Wear Resistance: A uniform Rockwell C32 hardness provides excellent resistance to abrasion and deformation over repeated use.
• Global Compliance and Quality Assurance: Manufactured to meet ISO 7379 specifications and compliant with RoHS 3 and REACH environmental regulations for safe, worldwide use.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to solve critical alignment and pivot challenges in precision assemblies. The 30mm shoulder length provides a stable bearing surface, eliminating the need for separate spacers or bushings in applications like linkages, gears, and rotating mechanisms. The alloy steel construction and black oxide finish offer exceptional resistance to corrosion and wear, making it ideal for automotive, machinery, and automation systems where high tensile strength and long-term reliability are paramount. The socket head design allows for compact installations in confined spaces, while the metric coarse thread (M4 x 0.7mm) ensures quick and secure fastening, reducing assembly time and improving production efficiency in industrial fastening solutions.

Specification Summary & Compliance

This shoulder screw features a Class 5g6g thread fit per metric standards, ensuring dimensional accuracy. The shoulder diameter tolerance is -0.072 to -0.01 mm, and the shoulder length tolerance is 0 to 0.25 mm, guaranteeing precise fitment. It is manufactured in compliance with the ISO 7379 standard and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and regulated industries.