S-98451A118 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 360 brass construction, ideal for harsh industrial environments and reducing maintenance costs.
• Precise alignment and secure component positioning due to the precisely machined 6mm shoulder with tight diameter and length tolerances.
• High-strength performance offering a tensile strength of 40,000 psi and Rockwell B55 hardness for reliable, durable fastening.
• Consistent and reliable thread engagement ensured by the Class 6g metric thread fit, minimizing the risk of cross-threading.
• Easy installation with standard tools using the 2.5 mm hex socket drive, streamlining assembly processes.
• Compliance with stringent environmental regulations, being RoHS 3 and REACH compliant for safe use in regulated industries.
• Versatile coarse thread design (M4 x 0.7 mm) for quick assembly and strong holding power in various materials.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to solve common alignment and wear issues in industrial applications. The 360 brass material provides excellent corrosion resistance, making it suitable for environments exposed to moisture or chemicals. The precise shoulder fit with tight tolerances on diameter and length ensures accurate component positioning, reducing misalignment and extending the life of assembled parts. With a Class 6g thread and coarse thread pitch, it offers quick, secure fastening in machinery, electronics, and automotive assemblies. The socket head design with a 2.5 mm hex drive allows for easy installation in confined spaces, enhancing efficiency in precision engineering projects where reliability and compliance with standards like RoHS are critical.

Specification Summary & Compliance

This M4 shoulder screw adheres to metric system standards with a Class 6g thread fit for precise tolerance. The shoulder diameter tolerance is -0.025 to 0 mm, and shoulder length tolerance is 0 to 0.05 mm, ensuring high accuracy. It is manufactured to meet RoHS 3 (2015/863/EU) compliance with exemption 6(c) for lead in copper alloy and is REACH (EC 1907/2006) compliant, confirming its suitability for regulated industrial use without hazardous substances.