S-90318A740 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and chemical exposure.
• Precise alignment and pivot function enabled by the 4mm shoulder diameter with a tight tolerance of -0.025 to 0 mm.
• High mechanical strength and durability offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable performance under load.
• Easy installation and space-saving design with a 2 mm hex drive and ultra-low socket head profile for confined spaces.
• Accurate and secure fastening with a Class 6g thread fit and M3 x 0.5mm coarse pitch for quick assembly and vibration resistance.
• Consistent dimensional stability from the 8mm shoulder length with a precise 0 to 0.05 mm tolerance, ensuring repeatable positioning.
• Compliance with environmental and safety standards, being RoHS 3 and REACH compliant for use in regulated industries.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical challenges in precision assembly and machinery. Made from 316 Stainless Steel, it provides excellent resistance to corrosion and oxidation, making it suitable for applications in marine, chemical processing, and food equipment where moisture and chemicals are present. The ultra-low socket head with a hex drive allows for easy access in tight spaces, reducing installation time and tool interference. The precise shoulder fit and Class 6g thread ensure accurate alignment and secure fastening in moving parts, such as in robotics, conveyor systems, and electronic enclosures, minimizing wear and maintenance. Its high tensile and shear strength supports heavy-duty use, while compliance with RoHS and REACH standards ensures safety and environmental responsibility in industrial settings.

Specification Summary & Compliance

This metric shoulder screw features an M3 thread size with a 0.5mm coarse pitch and Class 6g thread fit for standard metric applications. The shoulder diameter is 4 mm with a tolerance of -0.025 to 0 mm, and the shoulder length is 8 mm with a tolerance of 0 to 0.05 mm, ensuring precise dimensional accuracy. It conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing it is free from hazardous substances and suitable for various industrial and engineering uses.