S-90318A840 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and outdoor applications
• Precise component alignment enabled by the 20mm shoulder with tight tolerances, reducing assembly errors and improving machine performance
• High-strength reliability delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical loads
• Space-saving installation with ultra-low socket head profile, perfect for compact assemblies and restricted-access applications
• Consistent thread engagement ensured by Class 6g thread fit and coarse M4 x 0.7mm threading, providing vibration resistance and secure fastening
• Easy installation and removal with 2.5mm hex drive, allowing efficient maintenance and reducing tool slip in high-torque scenarios
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries and international markets

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and durability challenges in industrial applications. The 316 stainless steel material provides exceptional resistance to chemicals, moisture, and extreme temperatures, making it suitable for automation equipment, precision instruments, and marine components. The 20mm shoulder length with precise diameter control ensures accurate positioning of moving parts, reducing wear and preventing misalignment in rotary assemblies and linear guides. Combined with the Class 6g thread fit and coarse metric threading, it offers reliable fastening under dynamic loads and vibration, while the ultra-low profile socket head allows flush mounting in space-constrained designs. This M4 shoulder screw delivers long-term performance where dimensional stability and corrosion resistance are paramount.

Specification Summary & Compliance

This M4 x 0.7mm shoulder screw features a Class 6g thread fit per metric standards, with a shoulder diameter tolerance of -0.025 to 0 mm and shoulder length tolerance of 0 to 0.05 mm for high precision. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial and commercial use.