S-91202A218 2.9 mm ID x 5.1 mm OD DIN 127B Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through the split lock design that maintains constant spring tension against loosening under dynamic loads
• Enhanced corrosion protection with zinc-plated steel construction, extending service life in demanding industrial environments
• Precision dimensional compatibility with 2.9mm ID specifically engineered for M2.5 screw applications
• Optimized load distribution with 5.1mm OD providing increased bearing surface for more secure fastening
• Exceptional durability with Rockwell C44 hardness ensuring consistent performance under repeated stress
• Reliable standardization through DIN 127B compliance guaranteeing interchangeability and quality consistency
• Environmental compliance assurance meeting both RoHS 3 and REACH standards for global manufacturing applications

Professional Applications & Engineering Value

This M2.5 split lock washer delivers critical engineering solutions for vibration-prone applications where fastener security is paramount. The zinc-plated steel construction provides essential corrosion resistance while maintaining the spring tension necessary for preventing loosening in machinery, automotive assemblies, and electronic enclosures. The DIN 127B standard ensures precise dimensional accuracy and reliable performance in metric fastener systems. With its specialized split lock design, this washer actively counters rotational forces and thermal cycling effects that commonly compromise fastener integrity in industrial settings. The combination of Rockwell C44 hardness and controlled thickness (0.5-0.7mm) provides optimal deflection characteristics without sacrificing structural integrity, making it ideal for precision equipment where space constraints and vibration resistance are simultaneous concerns.

Specification Summary & Compliance

This split lock washer features precise metric dimensions with 2.9mm internal diameter, 5.1mm outer diameter, and 0.5-0.7mm thickness range. Manufactured to DIN 127B specifications for dimensional accuracy and performance reliability. The component demonstrates full compliance with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations regarding substance restrictions. Constructed from zinc-plated steel with Rockwell C44 hardness rating, ensuring consistent mechanical properties and corrosion resistance for industrial fastener applications.