S-98621A127 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance and durability with 18-8 stainless steel construction and TiCN coating, ideal for harsh industrial environments
• Precise alignment and reduced assembly wear due to the accurately machined 12mm shoulder with tight tolerances
• High mechanical strength and load capacity with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Reliable thread engagement and secure fastening provided by the Class 6g thread fit and coarse M4x0.7 metric thread
• Easy installation and removal using a standard 2.5mm hex drive, minimizing tool slippage and damage
• Compliance with environmental and safety standards including RoHS 3 and REACH, ensuring suitability for regulated industries
• Smooth head texture and standard socket profile for a clean finish and consistent performance in precision assemblies

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and durability challenges in precision machinery, automation systems, and electronic enclosures. The 12mm precisely machined shoulder acts as a pivot, bearing surface, or locating dowel, eliminating the need for additional components and reducing assembly complexity. Made from 18-8 stainless steel and enhanced with a TiCN coating, it offers superior resistance to corrosion, wear, and galling, extending service life in high-cycle applications. The Class 6g thread fit and coarse thread pitch ensure quick, secure fastening with minimal cross-threading risk, while the 2.5mm hex drive allows for efficient torque application in confined spaces. Ideal for use in robotics, medical devices, and optical equipment, this screw provides reliable performance where dimensional accuracy and material integrity are paramount.

Specification Summary & Compliance

This metric shoulder screw adheres to precise dimensional standards, including a shoulder diameter tolerance of -0.025 to 0 mm and shoulder length tolerance of 0 to 0.05 mm for exact fitment. The M4x0.7 coarse thread conforms to Class 6g tolerance, ensuring compatibility with standard metric nuts and threaded holes. Manufacturing and material specifications support a tensile strength of 70,000 psi and Rockwell B55 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing the absence of restricted hazardous substances for safe industrial and commercial use.