S-92981A777 M4 ASTM A108 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional Durability – Made from high-strength alloy steel with a Rockwell C32 hardness, ensuring long-term reliability in demanding industrial environments.
- Corrosion Resistance – Black oxide finish provides enhanced protection against rust and wear, extending the screw's service life.
- Precise Thread Fit – Class 5g6g thread ensures consistent, secure fastening with minimal risk of loosening under vibration.
- Easy Installation & Removal – Knurled head with a 2.5 mm hex drive allows for firm grip and straightforward tool engagement.
- High Tensile Strength – 140,000 psi tensile strength supports heavy-duty applications without failure.
- Standardized Dimensions – Metric M4 x 0.7mm coarse thread and consistent shoulder diameter (5 mm) ensure compatibility with standard components.
- Regulatory Compliance – Meets ASTM A108, RoHS 3, and REACH standards, guaranteeing safety and environmental responsibility.
Professional Applications & Engineering Value
This M4 shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. The alloy steel construction, combined with a black oxide finish, offers superior resistance to corrosion and mechanical stress, making it ideal for machinery, automotive, and electronic equipment where vibration and environmental factors are concerns. The knurled head and hex drive facilitate quick, secure installation, while the class 5g6g thread ensures tight tolerances for reliable performance in dynamic applications. By integrating these features, this screw minimizes maintenance downtime and enhances operational efficiency in industrial fastening systems.
Specification Summary & Compliance
This shoulder screw adheres to precise dimensional standards, including a Class 5g6g thread fit for metric applications, with shoulder diameter tolerance of -0.072 to -0.01 mm and length tolerance of 0 to 0.25 mm. It complies with ASTM A108 specifications for material quality, and is verified as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring it meets international environmental and safety regulations for industrial use.
