S-92981A793 M5 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.
• High Tensile Strength & Load Capacity – 140,000 psi tensile strength and Rockwell C32 hardness ensure reliable performance under heavy mechanical stress.
• Precision Shoulder for Accurate Alignment – 6.5mm shoulder diameter with tight tolerances (-0.072 to -0.01 mm) guarantees exact component positioning and reduces assembly errors.
• Secure Hex Drive Installation – 3 mm hex socket drive offers slip-resistant torque application and easy installation with standard tools.
• Knurled Head for Improved Grip – Knurled head texture allows for better manual handling and adjustment during assembly or maintenance.
• Coarse Thread for Quick Assembly – M5x0.8 mm coarse thread enables faster installation and secure fastening in various materials.
• Compliance with International Standards – Meets ASTM A108, RoHS 3, and REACH regulations, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This M5 shoulder screw is engineered to address critical alignment and load-bearing challenges in precision machinery, automation systems, and fixture design. The alloy steel construction with black oxide finish resists corrosion and extends service life in harsh conditions, while the 50mm shoulder length provides stable support for rotating parts like bearings, pulleys, and gears. The Class 5g6g thread fit and knurled socket head ensure consistent clamping force and easy access in confined spaces, reducing downtime and maintenance costs. Ideal for CNC equipment, automotive assemblies, and industrial robotics, this metric shoulder screw delivers reliable performance where dimensional accuracy and high strength are non-negotiable.

Specification Summary & Compliance

This shoulder screw features a M5x0.8 mm coarse thread with Class 5g6g tolerance, ensuring precise fit in metric applications. The shoulder diameter is maintained at 6.5 mm with a tight tolerance of -0.072 to -0.01 mm, and the shoulder length is 50 mm with a 0 to 0.25 mm tolerance. Manufactured in compliance with ASTM A108 standards, it is also RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting environmental and safety requirements for industrial use.