S-92981A770 M2 ASTM A108 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Black oxide finish provides superior protection against rust and wear in demanding industrial environments.
• Precision Alignment & Reduced Wear: 3mm shoulder diameter with tight tolerances ensures accurate component positioning and minimizes bushing wear.
• High Tensile Strength for Demanding Loads: Alloy steel construction with 140,000 psi tensile strength reliably handles high-stress applications.
• Secure & Non-Slip Fastening: Knurled socket head design offers improved grip during installation, preventing tool slippage.
• Consistent Thread Performance: Class 5g6g thread fit with coarse 0.4mm pitch ensures reliable engagement and vibration resistance.
• Easy Installation with Standard Tools: Hex drive socket head allows for quick assembly using common 1.5mm hex keys.
• Compliance with Global Standards: Meets ASTM A108, RoHS 3, and REACH regulations for safe, reliable use in regulated industries.

Professional Applications & Engineering Value

This M2 shoulder screw is engineered to solve critical alignment and durability challenges in precision assemblies. The alloy steel construction, hardened to Rockwell C32, provides exceptional strength for high-load applications like robotics, automotive components, and electronic enclosures. The black oxide finish enhances corrosion resistance, extending service life in humid or chemically aggressive environments. The precisely machined 3mm shoulder diameter with minimal tolerance ensures accurate axial positioning of moving parts, reducing wear on mating components. Combined with the Class 5g6g thread fit and coarse 0.4mm pitch, it delivers secure fastening that resists loosening under vibration, making it ideal for machinery, conveyor systems, and precision instruments where reliability is paramount.

Specification Summary & Compliance

This metric shoulder screw features precise dimensional control with shoulder diameter tolerance of -0.072 to -0.01 mm and shoulder length tolerance of 0 to 0.25 mm. Thread specifications include M2 x 0.4mm coarse pitch with Class 5g6g thread fit per ISO standards. Manufacturing complies with ASTM A108 for material consistency, and the product is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence for industrial and export applications.