S-90269A128 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and washdown applications
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B79 hardness for reliable performance under load
• Precise component alignment enabled by the 5mm diameter shoulder with controlled tolerances, reducing assembly errors
• Secure and non-slip fastening thanks to the knurled socket head and 2.5mm hex drive, preventing tool slippage
• Robust thread engagement with Class 5g6g metric coarse thread (M4 x 0.7mm), ensuring consistent clamping force
• Compliance with major regulations including RoHS 3 and REACH, making it suitable for global industrial supply chains
• Versatile shoulder design with an 8mm length, providing a stable pivot or bearing surface in mechanical assemblies

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to solve critical alignment and corrosion challenges in demanding industrial applications. The 316 stainless steel material offers excellent resistance to chemicals and saltwater, preventing failure in food processing, marine, or chemical equipment. The precision shoulder diameter acts as a built-in spacer or pivot, eliminating the need for additional bushings and reducing part count in assemblies like linkages, gears, and rotating fixtures. The knurled socket head with a 2.5mm hex drive ensures a positive grip for high-torque installation, even in greasy or gloved conditions. With its Class 5g6g thread and coarse pitch, it provides rapid assembly and reliable holding power in metric machinery, minimizing downtime and maintenance costs.

Specification Summary & Compliance

This precision shoulder screw features an M4 x 0.7mm coarse metric thread with a Class 5g6g tolerance fit. The shoulder diameter is 5mm with a tolerance of -0.072 to -0.01 mm, and the shoulder length is 8mm with a tolerance of 0 to 0.25 mm, ensuring high dimensional accuracy for consistent performance. The product is manufactured to comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and regulated industries.