S-90278A372 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment through controlled shoulder diameter tolerance (-0.025 to 0 mm) for reliable assembly fit
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Secure hex socket drive (2.5mm) prevents cam-out and allows high torque application in confined spaces
• Reliable thread engagement with Class 6g thread fit and coarse M4 x 0.7mm thread pitch for vibration resistance
• Optimized dimensional design featuring 5mm thread length and 14mm shoulder length for versatile mounting solutions
• Compliance assurance with RoHS 3 and REACH regulations for global industrial use and environmental safety

Professional Applications & Engineering Value

This precision shoulder screw delivers exceptional engineering value in applications requiring exact component positioning and rotational control. The 18-8 stainless steel construction provides superior corrosion resistance, making it ideal for machinery, automation systems, and electronic enclosures exposed to moisture or chemicals. The precise shoulder fit with controlled diameter tolerance ensures accurate alignment of moving parts in assemblies, eliminating play and reducing wear. The hex socket drive allows for high torque installation in space-constrained applications, while the Class 6g thread fit and coarse M4 x 0.7mm thread pitch maintain secure fastening under vibration. These metric shoulder screws solve critical alignment challenges in precision equipment, manufacturing jigs, and robotic systems where dimensional accuracy is paramount.

Specification Summary & Compliance

This M4 shoulder screw features precise dimensional tolerances including shoulder diameter tolerance of -0.025 to 0 mm and shoulder length tolerance of 0 to 0.05 mm. The metric thread conforms to Class 6g fit standards with coarse spacing. Manufactured from 18-8 stainless steel with Rockwell B55 hardness and 70,000 psi tensile strength. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and restricted substance control.