S-98621A119 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced wear resistance and extended service life from the durable TiCN coating that reduces friction
• Precise component alignment and reduced assembly stress due to the accurately machined 20mm shoulder with tight tolerances
• High-strength performance under load with 70,000 psi tensile strength and Rockwell B55 hardness
• Reliable and secure fastening ensured by the Class 6g thread fit and coarse M3x0.5mm metric thread
• Easy installation and removal with the standard hex socket head and 2mm drive for common tools
• Compliance with global environmental standards including RoHS 3 and REACH for safe, responsible sourcing

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical alignment and durability challenges in industrial applications. The 18-8 stainless steel base material provides excellent resistance to rust and corrosion, while the TiCN coating significantly enhances surface hardness and reduces galling, making it ideal for high-cycle assembly operations. The precise shoulder diameter and length with minimal tolerances ensure accurate positioning of components like gears, pulleys, and linkages, minimizing play and vibration. Its right-hand coarse thread and Class 6g fit offer reliable engagement in metals and plastics, supporting robust performance in machinery, automation systems, and precision instruments where repeatability and strength are paramount.

Specification Summary & Compliance

This metric shoulder screw features an M3x0.5mm coarse thread with Class 6g thread fit per ISO standards, ensuring dimensional accuracy. The shoulder diameter is 4 mm with a tolerance of -0.025 to 0 mm, and the shoulder length is 20 mm with a tolerance of 0 to 0.05 mm, providing precise shoulder fit for consistent assembly. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming adherence to environmental and safety regulations for use in various global markets.