S-98451A119 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 360 Brass construction, ideal for harsh environments and electrical applications
• High-strength performance offering 40,000 psi tensile strength and Rockwell B55 hardness for reliable, durable fastening
• Precise alignment and pivot function enabled by the accurately machined 8mm shoulder with tight diameter tolerance
• Secure, tamper-resistant installation with the 2.5mm hex socket drive, allowing high torque application in confined spaces
• Consistent thread engagement due to the Class 6g thread fit and coarse M4 x 0.7mm pitch for quick assembly
• Environmental regulation compliance meeting RoHS 3 and REACH standards for safe, global industrial use
• Smooth head finish reducing friction and preventing damage to mating surfaces during operation

Professional Applications & Engineering Value

This precision M4 shoulder screw is engineered from 360 Brass to address common challenges in mechanical assemblies requiring electrical conductivity, corrosion resistance, and non-magnetic properties. The 8mm shoulder length with precise tolerance provides an exact locating diameter, eliminating misalignment in rotating parts like gears, pulleys, and linkages. The hex socket drive allows for high clamping force in tight spaces, while the Class 6g thread fit ensures reliable engagement in metric coarse thread applications. Ideal for use in electronics, automotive, and precision instrumentation, this screw reduces wear and maintenance, enhancing assembly lifespan and performance.

Specification Summary & Compliance

The screw features a Class 6g thread fit per metric standards, with a shoulder diameter tolerance of -0.025 to 0 mm and shoulder length tolerance of 0 to 0.05 mm for precise fit. 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 environmental and safety regulations for industrial components.