Spring Washer | M20 (21 x 33 x 4) | Self | Wt.10 p/c ~145 gram

The Spring Washer (21 mm ID × 33 mm OD × 4 mm thickness) is manufactured from high-quality steel and designed to prevent loosening of bolts and nuts due to vibration and dynamic loads. Its split lock design creates spring tension that maintains pressure in the fastening joint.

This washer comes with a self finish (natural steel color) and is widely used in industrial machinery, automotive assemblies, construction structures, and heavy equipment fastening. It helps improve joint reliability and keeps bolts and nuts securely tightened.