S-90269A478 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel and black oxide finish, ideal for harsh environments and extended service life
• Precise alignment and smooth rotation ensured by the 40mm shoulder with standard fit, reducing component wear
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for demanding industrial applications
• Secure and reliable fastening with Class 5g6g thread fit and M3x0.5 coarse thread for vibration resistance
• Easy installation and removal using a standard 2mm hex drive and knurled socket head for improved grip
• Strict dimensional accuracy with tight shoulder diameter and length tolerances for consistent performance
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 316 stainless steel construction, enhanced by a black oxide finish, provides exceptional resistance to corrosion, making it suitable for applications in chemical processing, marine equipment, and food machinery where moisture and corrosive agents are present. The 40mm shoulder length acts as a precise pivot or spacer, minimizing friction and maintaining accurate positioning in rotating parts like bearings, linkages, and gears. Combined with the Class 5g6g thread fit and coarse M3x0.5 metric thread, it ensures reliable fastening under dynamic loads and vibrations, reducing maintenance needs and enhancing operational efficiency in automated systems and industrial machinery.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with a thread size of M3 and pitch of 0.5 mm, featuring a Class 5g6g thread fit for precise engagement. Dimensional tolerances include a shoulder diameter of 4 mm (tolerance: -0.072 to -0.01 mm) and shoulder length of 40 mm (tolerance: 0 to 0.25 mm), ensuring consistent quality. It is manufactured from 316 stainless steel with a black oxide finish and meets regulatory requirements, including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, for safe industrial use.