S-90270A663 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Corrosion-resistant performance with 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications.
• Enhanced torque transmission and reduced stripping thanks to the socket head design with slotted drive for secure fastening in confined spaces.
• Reliable thread engagement and vibration resistance from the coarse M4x0.7mm thread with Class 6g fit, ensuring consistent assembly integrity.
• Precise component alignment and smooth rotation enabled by the accurately machined 16mm shoulder with minimal diameter tolerance.
• High mechanical strength and durability with Rockwell B55 hardness and 70,000 psi tensile strength for demanding load-bearing applications.
• Compliance with global environmental standards including RoHS 3 and REACH, supporting sustainable and safe manufacturing practices.
• Right-hand thread design for standard installation and compatibility with common metric fastener systems.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and wear issues in precision assemblies. The 18-8 stainless steel material offers excellent corrosion resistance, reducing maintenance in humid or chemically exposed settings like food processing or marine equipment. The 16mm shoulder length with precise tolerances acts as a pivot or spacer, minimizing friction and component misalignment in rotating mechanisms such as conveyor systems, robotics, and automotive linkages. Combined with the Class 6g thread fit and coarse thread pitch, it ensures quick assembly and reliable performance under vibration, making it a top choice for industrial shoulder bolts in machinery that requires repeatable accuracy and longevity.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with an M4 thread size, 0.7mm coarse pitch, and Class 6g thread fit for consistent dimensional accuracy. The shoulder diameter is manufactured to a tight tolerance of -0.025 to 0 mm, and the shoulder length is held within 0 to 0.05 mm for precise fit. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of hazardous substances and suitable for global supply chains.