S-90318A790 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments like marine or chemical processing.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding applications.
• High precision assembly ensured by Class 6g thread fit and precise shoulder diameter tolerance (-0.025 to 0 mm), reducing play and misalignment.
• Space-saving ultra-low socket head with 2.5 mm hex drive allows for compact designs and easy installation in confined areas.
• Enhanced durability from Rockwell B70 hardness, providing excellent wear resistance and long service life.
• Broad industrial compliance with RoHS 3 and REACH regulations, ensuring safety and environmental standards are met.
• Optimized for coarse threading with M4 x 0.7mm metric thread, facilitating quick assembly and disassembly in high-vibration settings.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address common industrial challenges such as component misalignment and corrosion-induced failure. Crafted from 316 Stainless Steel, it excels in aggressive environments, including marine, chemical, and food processing equipment, where moisture and chemicals are prevalent. The ultra-low socket head and hex drive design enable secure fastening in tight spaces, while the Class 6g thread fit and precise shoulder diameter ensure accurate positioning in assemblies like pivots, bearings, and gears. This reduces wear, minimizes maintenance, and enhances operational efficiency, making it a reliable choice for precision engineering and industrial automation applications.

Specification Summary & Compliance

This metric shoulder screw features an M4 x 0.7mm coarse thread with Class 6g tolerance for consistent fit. The shoulder diameter is tightly controlled at 5 mm with a tolerance of -0.025 to 0 mm, and shoulder length is 8 mm with a 0 to 0.05 mm tolerance, ensuring precise alignment. Manufactured to standard metric threading specifications, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable industrial use.