S-98451A124 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 360 Brass construction, ideal for harsh environments and reducing maintenance needs.
• High strength and durability from Rockwell B55 hardness and 40,000 psi tensile strength, ensuring reliable performance under load.
• Precise alignment and smooth rotation due to the accurately machined 20mm shoulder with minimal diameter tolerance.
• Easy installation and high torque transmission with the 2.5 mm hex socket drive, minimizing stripping and tool slippage.
• Consistent and secure thread engagement provided by the Class 6g thread fit and M4 x 0.7mm coarse pitch for quick assembly.
• Compliance with environmental regulations, including RoHS 3 and REACH, ensuring safe and sustainable use in various industries.
• Versatile right-hand metric threading for broad compatibility with standard components and simplified sourcing.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address common assembly challenges in precision industries such as electronics, automotive, and machinery. The 360 Brass material offers excellent corrosion resistance, reducing failure in humid or chemically aggressive settings. Its 20mm shoulder length with tight tolerances ensures precise component spacing and alignment, preventing misalignment and wear in rotating parts. The hex socket drive allows for high-torque installation in confined spaces, while the Class 6g thread fit and coarse pitch enable rapid, secure fastening without cross-threading. Ideal for applications requiring reliable metric fasteners with environmental compliance, this screw enhances durability and reduces downtime in B2B industrial assemblies.

Specification Summary & Compliance

This shoulder screw features a Metric M4 x 0.7mm thread with Class 6g tolerance for precise fit, a shoulder diameter of 5 mm with tolerance of -0.025 to 0 mm, and shoulder length of 20 mm with tolerance of 0 to 0.05 mm. It complies with RoHS 3 (2015/863/EU) under exemption 6(c) for lead in copper alloy and is REACH (EC 1907/2006) compliant, ensuring adherence to international environmental and safety standards.