S-90269A127 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction, ideal for chemical, marine, and outdoor applications.
• High mechanical strength and durability with a tensile strength of 70,000 psi and Rockwell B79 hardness, ensuring reliable performance under load.
• Precise alignment and secure pivoting enabled by the 5mm diameter shoulder with controlled tolerances, reducing wear in assemblies.
• Efficient high-torque installation using the 2.5mm hex socket drive, minimizing tool slippage and speeding up assembly processes.
• Secure non-slip grip during manual adjustment provided by the knurled head texture, enhancing handling in tight spaces.
• Consistent and reliable thread engagement with Class 5g6g metric coarse threads (M4 x 0.7mm), ensuring vibration resistance and easy assembly.
• Compliance with global environmental standards including RoHS 3 and REACH, making it suitable for regulated industries and export markets.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and fixture design. The 316 stainless steel material offers exceptional resistance to corrosion and oxidation, which is vital for applications in humid, chemical, or marine environments where component failure is not an option. The integrated shoulder with its precise diameter and length provides a stable bearing surface, eliminating the need for separate spacers and reducing assembly complexity. This design prevents axial movement and misalignment in rotating parts, such as in linkages, gears, and pivoting mechanisms. Combined with the hex socket drive and coarse thread, it ensures quick, secure fastening even in high-vibration settings, enhancing overall equipment reliability and reducing maintenance downtime for industrial users.

Specification Summary & Compliance

This precision shoulder screw features an M4 x 0.7mm coarse metric thread with a Class 5g6g fit for consistent thread engagement. The shoulder diameter is 5 mm with a tolerance of -0.072 to -0.01 mm, and the shoulder length is 6 mm with a tolerance of 0 to 0.25 mm, ensuring high dimensional accuracy. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and regulated industrial applications.