S-92981A772 M2 ASTM A108 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Black oxide finish on alloy steel provides reliable protection against rust, extending service life in harsh industrial environments.
• Superior Strength for Demanding Applications: With a tensile strength of 140,000 psi and Rockwell C32 hardness, this screw withstands high stress without deformation.
• Precision Shoulder Fit for Accurate Alignment: The 3mm shoulder diameter with tight tolerance (-0.072 to -0.01 mm) ensures exact component positioning and reduces assembly errors.
• Easy Installation & Secure Fastening: Hex socket drive (1.5mm) and knurled head allow for firm tool grip and efficient torque application, minimizing slippage.
• Reliable Thread Performance: Class 5g6g thread fit with coarse 0.4mm pitch offers consistent engagement and vibration resistance in metric assemblies.
• Compliance with Industry Standards: Meets ASTM A108 specifications and is RoHS 3 & REACH compliant, ensuring safety and regulatory adherence.
• Versatile Right-Hand Thread Design: Standard coarse thread spacing simplifies installation in various industrial equipment and machinery.

Professional Applications & Engineering Value

This M2 shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The alloy steel construction, combined with a black oxide finish, provides exceptional corrosion resistance, making it ideal for environments exposed to moisture or chemicals. The precise shoulder diameter tolerance (-0.072 to -0.01 mm) and 12mm shoulder length ensure accurate component positioning in applications like robotics, automotive systems, and electronic enclosures, reducing wear and misalignment. The hex socket drive and knurled head facilitate easy installation with standard tools, while the Class 5g6g thread fit and coarse pitch enhance grip and vibration resistance. By integrating these features, this metric shoulder screw delivers reliable performance in high-stress industrial settings, minimizing maintenance and downtime.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 5g6g thread fit per ISO metric specifications, ensuring consistent threading and assembly compatibility. The shoulder diameter tolerance is maintained at -0.072 to -0.01 mm, with a shoulder length tolerance of 0 to 0.25 mm for accurate fit. It complies with ASTM A108 for material quality and is verified to be RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting environmental and safety regulations in global markets.