S-93856A143 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under load
• Precision thread fit with Class 5g6g tolerance ensuring secure, vibration-resistant connections in metric assemblies
• Easy installation and removal via 2 mm hex socket drive and knurled head for superior grip and torque application
• Versatile shoulder design providing accurate component alignment and spacing with diameters from 4-49.75 mm
• Regulatory compliance meeting RoHS 3 and REACH standards for safe use in global industrial markets
• Coarse thread pitch (0.7mm) enabling faster assembly and reduced cross-threading risk in high-volume applications

Professional Applications & Engineering Value

This M4 shoulder screw delivers critical engineering solutions in precision assemblies where alignment and durability are paramount. Manufactured from 18-8 stainless steel, it resists oxidation and chemical exposure in automotive, electronics, and machinery applications. The hex socket drive and knurled head texture allow high-torque installation without slippage, while the Class 5g6g thread fit maintains positional accuracy in moving parts. The shoulder acts as a precise pivot or spacer, reducing wear in bushings, linkages, and rotating mechanisms. Its coarse thread metric design ensures rapid assembly in production lines, minimizing downtime and improving manufacturing efficiency.

Specification Summary & Compliance

This shoulder screw adheres to metric system standards with M4 x 0.7mm coarse threads and Class 5g6g thread fit tolerance. Shoulder diameter tolerance is maintained at -0.072 to -0.01 mm for precise component mounting. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. Mechanical properties include Rockwell B55 hardness and minimum 35,000 psi shear strength, manufactured to industrial fastener specifications for consistent performance.