S-90278A328 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 with 18-8 stainless steel construction, ideal for harsh industrial environments
- Enhanced alignment and positioning thanks to the precise 5mm diameter shoulder with tight tolerance control
- High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing performance
- Secure hex drive engagement via the 2.5mm socket head, preventing cam-out and enabling high-torque installation
- Consistent thread quality with Class 6g fit and coarse M4 x 0.7mm thread for robust fastening in various materials
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
- Optimized shoulder length of 10mm with controlled tolerance for precise component spacing and pivot applications
Professional Applications & Engineering Value
This M4 shoulder screw is engineered to solve critical alignment and wear issues in precision machinery. The 18-8 stainless steel material provides excellent corrosion resistance, reducing maintenance in humid or chemically aggressive settings. The 5mm shoulder diameter with its tight tolerance ensures components like bearings, gears, or linkages are accurately located without additional bushings, minimizing assembly time and play. The 10mm shoulder length offers a stable unthreaded section that acts as a pivot or spacer, preventing thread damage during repeated motion. Combined with the Class 6g thread fit and hex socket drive, it delivers reliable fastening in automation, electronics, and mechanical assemblies where vibration resistance and positional accuracy are paramount.
Specification Summary & Compliance
The screw features a Metric M4 x 0.7mm coarse thread with Class 6g tolerance for consistent engagement. Shoulder diameter tolerance is -0.025 to 0 mm, and shoulder length tolerance is 0 to 0.05 mm, ensuring precise fit. Manufactured in accordance with standard metric thread specifications, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for industrial components.
