S-90269A221 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 Stainless Steel construction, ideal for harsh chemical and marine environments
• Enhanced grip and anti-slip performance with the knurled socket head design for secure tool engagement
• High mechanical strength and durability with 70,000 psi tensile strength and Rockwell B79 hardness for demanding applications
• Precise component alignment and spacing enabled by the 5mm diameter shoulder with controlled tolerances
• Reliable coarse thread engagement with Class 5g6g fit ensuring consistent fastening in industrial assemblies
• Broad regulatory compliance meeting RoHS 3 and REACH standards for global industrial use
• Optimized for high-torque installation using standard 2.5mm hex tools without head stripping

Professional Applications & Engineering Value

This M4 shoulder screw delivers critical engineering value in precision assemblies where alignment, corrosion resistance, and repeated disassembly are required. The 316 Stainless Steel material provides exceptional performance in chemical processing, marine hardware, and food equipment by resisting chloride-induced pitting. The 5mm shoulder diameter with tight tolerances acts as a precision pivot or spacer in rotating mechanisms, eliminating the need for additional bushings. Combined with the Class 5g6g thread fit and coarse 0.7mm pitch, it ensures rapid assembly in automated production while maintaining vibration resistance. The knurled socket head enhances torque transmission for high-strength fastening in confined spaces, making it ideal for machinery, robotics, and precision instrument manufacturing where reliability is non-negotiable.

Specification Summary & Compliance

This precision shoulder screw features M4 x 0.7mm coarse metric thread with Class 5g6g tolerance for consistent fit. The shoulder maintains a 5mm diameter with -0.072 to -0.01 mm tolerance and 11mm length with 0 to 0.25 mm tolerance. Manufactured to industrial standards using 316 Stainless Steel with Rockwell B79 hardness, it achieves 70,000 psi tensile strength and 35,000 psi minimum shear strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for hazardous substance restrictions.