S-91273A786 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced durability and wear resistance from the black oxide finish, providing long-lasting performance
• Precise alignment and secure positioning with a 20mm shoulder length and tight diameter tolerance (-0.04 to -0.01 mm)
• High-strength reliability offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
• Secure, non-slip installation thanks to the knurled socket head and 2 mm hex drive for easy torque application
• Accurate thread engagement with Class 5g6g thread fit and M4 x 0.7mm coarse thread for quick assembly
• Environmental and regulatory compliance meeting RoHS 3 and REACH standards for safe, sustainable use

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and stability challenges in industrial machinery, automation systems, and precision equipment. The 18-8 stainless steel material provides excellent corrosion resistance, while the black oxide finish enhances surface durability and reduces galling. With a 20mm shoulder length and precise diameter tolerances, it ensures exact component positioning, minimizing misalignment and vibration in high-stress environments. The Class 5g6g thread fit and coarse metric thread design facilitate quick, reliable fastening in applications like rotating assemblies, pivots, and jigs, where consistent performance and high tensile strength are essential for operational efficiency and safety.

Specification Summary & Compliance

This shoulder screw features a Class 5g6g thread fit with M4 x 0.7mm coarse metric threads, ensuring dimensional accuracy per standard specifications. The shoulder diameter tolerance is -0.04 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, supporting precise engineering requirements. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industrial applications.