S-90278A505 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Precise component alignment ensured by the 35mm shoulder with tight length tolerance, minimizing assembly play and vibration.
• High-strength fastening performance with a tensile strength of 70,000 psi and Rockwell B55 hardness for reliable load-bearing applications.
• Secure and efficient installation using a standard 2.5mm hex drive, providing excellent torque transmission and reducing the risk of stripping.
• Accurate and reliable thread engagement with a Class 6g fit and M4 x 0.7mm coarse thread, facilitating quick assembly and disassembly.
• Compliance with major environmental regulations, being RoHS 3 and REACH compliant for use in regulated markets and sustainable operations.
• Durable and smooth socket head profile that resists wear and allows for a clean, flush finish in precision machinery.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 18-8 stainless steel material offers excellent resistance to corrosion and oxidation, making it suitable for applications in automotive, electronics, and machinery where environmental factors are a concern. The 35mm shoulder length with precise tolerances provides a stable bearing surface, essential for pivoting mechanisms, rotating assemblies, and precise positioning in jigs and fixtures. The socket head with a 2.5mm hex drive allows for high-torque installation in confined spaces, reducing the risk of cam-out and ensuring secure fastening. Combined with a Class 6g thread fit and coarse thread spacing, it ensures quick, reliable engagement, minimizing assembly time and enhancing productivity in high-volume manufacturing and maintenance operations.

Specification Summary & Compliance

This precision shoulder screw features an M4 x 0.7mm thread with a Class 6g thread fit per metric standards, ensuring dimensional accuracy and interchangeability. The shoulder diameter is 5mm with a tolerance of -0.025 to 0 mm, and the shoulder length is 35mm with a tolerance of 0 to 0.05 mm, providing a precise fit for alignment-critical applications. Manufactured from 18-8 stainless steel with a tensile strength of 70,000 psi, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its suitability for environmentally conscious and regulated industrial uses.