S-90278A376 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment ensured by the 30mm shoulder with tight tolerances for reduced assembly errors
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing performance
• Easy installation and removal using the standard 2.5mm hex socket drive, minimizing tool slippage
• Accurate thread engagement with Class 6g fit and M4 x 0.7mm coarse thread for secure fastening in various materials
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Smooth head texture reduces friction and potential damage to mating surfaces during tightening

Professional Applications & Engineering Value

This M4 shoulder screw delivers exceptional engineering value in applications requiring precise shaft positioning and rotational control. The 18-8 stainless steel construction provides excellent corrosion resistance, making it suitable for machinery, automation systems, and electronic assemblies exposed to moisture or chemicals. The 30mm shoulder length with precise diameter tolerance acts as a reliable pivot or spacer, eliminating the need for additional bushings and reducing assembly complexity. With its metric coarse thread and Class 6g thread fit, it ensures vibration-resistant fastening in plastics, metals, and composite materials. The socket head design with 2.5mm hex drive allows for high-torque installation in confined spaces, while the smooth head finish prevents galling. These features make it an ideal solution for precision alignment in robotics, conveyor systems, and manufacturing equipment where dimensional accuracy and durability are critical.

Specification Summary & Compliance

This metric shoulder screw features M4 x 0.7mm coarse threads with Class 6g thread fit and 5mm thread length. The shoulder maintains a diameter of 5mm with tolerance of -0.025 to 0mm and length of 30mm with tolerance of 0 to 0.05mm for precise fit. 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 hazardous substance restrictions.