S-94361A592 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black oxide finish, extending service life in harsh industrial environments.
• Exceptional strength and durability from alloy steel construction and Rockwell C32 hardness, ensuring reliable performance under high stress.
• Precise alignment and smooth rotation due to the 16mm shoulder length with controlled tolerances, reducing wear on mating parts.
• Secure, non-slip fastening enabled by the knurled head texture and hex socket drive, allowing for high torque application.
• Wide compatibility and easy assembly with standard M4x0.7 coarse metric threads and Class 6g fit, ensuring interchangeability.
• High tensile strength of 140,000 psi for demanding applications, providing a secure and long-lasting hold.
• Compliance with major environmental regulations including RoHS 3 and REACH, making them suitable for global supply chains.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and pivot point requirements in precision assemblies. The alloy steel core, hardened to Rockwell C32, provides the necessary high tensile strength to withstand repetitive loads and vibrations without failing. The black oxide finish offers a robust layer of protection against corrosion, which is vital for machinery operating in humid or chemically aggressive environments. The defining 16mm shoulder length acts as a precise datum for locating parts like gears, pulleys, and linkages, minimizing radial play and preventing fretting. Combined with the hex socket drive and knurled head, it ensures that the screw remains firmly seated during installation and operation, making it an ideal choice for automated assembly lines and high-precision industrial applications.

Specification Summary & Compliance

This precision shoulder screw features an M4x0.7 coarse metric thread with a Class 6g tolerance for reliable fit. The shoulder diameter is manufactured to a tight tolerance of -0.072 to -0.01 mm, and the shoulder length is held to 0 to +0.25 mm, ensuring high dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to strict environmental and safety standards for industrial components.