S-92981A785 M5 ASTM A108 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black oxide finish prolongs service life in harsh industrial environments, minimizing maintenance needs.
• Precise shoulder dimensions with tight diameter and length tolerances provide accurate alignment and secure component positioning.
• High hardness rating (Rockwell C32) offers excellent wear resistance, maintaining thread integrity through repeated assembly cycles.
• Knurled hex socket head allows for secure tool engagement and easy installation even in confined spaces.
• Coarse thread pitch enables quick assembly and disassembly while maintaining strong holding power.
• Comprehensive compliance with ASTM A108, RoHS 3, and REACH standards ensures material quality and environmental safety.

Professional Applications & Engineering Value

This M5 shoulder screw delivers critical engineering value in precision assembly applications where alignment accuracy and structural integrity are paramount. The alloy steel construction with black oxide finish provides optimal corrosion resistance for machinery, automotive components, and industrial equipment exposed to demanding conditions. The precisely controlled shoulder diameter and length with tight tolerances eliminate component wobble and ensure perfect concentricity in rotating assemblies, jigs, and fixtures. The hex socket head with knurled texture prevents tool slippage during torque application, while the Class 5g6g thread fit guarantees consistent engagement in threaded holes. These metric shoulder screws solve common alignment challenges in manufacturing equipment, robotics, and precision instruments where dimensional stability under load is critical.

Specification Summary & Compliance

This precision shoulder screw features M5x0.8 coarse thread with Class 5g6g thread fit per ISO standards, ensuring consistent mating with threaded components. The shoulder maintains precise dimensional control with diameter tolerance of -0.072 to -0.01 mm and length tolerance of 0 to 0.25 mm. Manufacturing complies with ASTM A108 specifications for material quality and processing. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for hazardous substance restrictions.