S-92981A145 M3 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Black oxide finish provides reliable protection against rust and wear in demanding industrial environments.
• Superior Tensile & Shear Strength: Alloy steel construction with 140,000 psi tensile strength and 84,000 psi minimum shear strength ensures secure, long-lasting fastening under high stress.
• Precision Shoulder Alignment: 4mm shoulder diameter with tight tolerance (-0.072 to -0.01 mm) guarantees accurate component positioning and reduced assembly play.
• Consistent Thread Performance: Class 5g6g thread fit with coarse M3 x 0.5mm pitch offers quick installation and reliable holding power in various materials.
• Easy Installation with Hex Drive: 2mm hex socket head allows for straightforward, high-torque application using standard tools, minimizing slippage.
• Broad Regulatory Compliance: Meets ISO 7379 specifications and is RoHS 3 & REACH compliant, ensuring suitability for global markets and sensitive applications.
• Optimized for Heavy-Duty Use: Rockwell C32 hardness and 20mm shoulder length provide stability and resistance to deformation in mechanical assemblies.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical alignment and load-bearing challenges in precision machinery, automation systems, and electronic enclosures. The alloy steel material, combined with a black oxide finish, ensures resistance to corrosion and mechanical stress, reducing maintenance needs in humid or high-friction environments. The coarse thread design and Class 5g6g thread fit enable rapid, secure fastening in metals and composites, while the precisely machined shoulder maintains component spacing and rotational stability. Ideal for use in industrial screws applications such as pivots, gears, and bearing mounts, this screw enhances assembly accuracy and operational lifespan, supporting efficient production and reduced downtime.

Specification Summary & Compliance

This shoulder screw adheres to ISO 7379 standards, with a Class 5g6g thread ensuring dimensional accuracy and interchangeability. Key tolerances include a shoulder diameter of 4 mm (-0.072 to -0.01 mm) and shoulder length of 20 mm (0 to 0.25 mm). It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), meeting environmental and safety regulations for industrial components.