S-90318A820 M4 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
- Superior corrosion resistance in harsh environments thanks to 316 Stainless Steel construction
- Exceptional mechanical strength with 70,000 psi tensile strength and 35,000 psi shear strength for reliable load-bearing performance
- Precise alignment and spacing enabled by the accurately machined 12mm shoulder with tight tolerances
- Streamlined low-profile design with an ultra-low socket head for applications with limited clearance
- Secure and reliable fastening ensured by the Class 6g thread fit and coarse 0.7mm pitch for quick assembly
- Enhanced durability and wear resistance from the Rockwell B70 hardness rating
- Compliance with stringent environmental regulations including RoHS 3 and REACH for global market suitability
Professional Applications & Engineering Value
This M4 shoulder screw is engineered to solve critical alignment and corrosion challenges in industrial applications. The 316 Stainless Steel material provides excellent resistance to chemicals and moisture, making it ideal for marine, chemical processing, and food-grade equipment. The precise shoulder with a diameter of 5mm and length of 12mm acts as a pivot or spacer, ensuring accurate component positioning in assemblies like machinery, robotics, and precision instruments. The ultra-low hex socket head allows for compact designs and easy installation in confined spaces, while the coarse pitch metric thread facilitates rapid assembly and disassembly, reducing maintenance downtime and improving operational efficiency.
Specification Summary & Compliance
This screw features a Class 6g thread fit per metric standards, ensuring dimensional accuracy and interchangeability. The shoulder diameter tolerance is -0.025 to 0 mm, and the shoulder length tolerance is 0 to 0.05 mm, guaranteeing precise fit for engineering applications. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in products requiring adherence to strict environmental and safety standards.
