Made from premium, durable steel for heavy-duty and longer use Brass plated for higher rust and corrosion resistance in any condition Provides a flat bearing surface and increases the contact area, thereby reducing stress and protecting parts and bolts Used with bolts or nuts to reduce friction, prevent leakage, isolate, prevent pressure from loosening or dispersing Widely used in industrial and civil fields such as equipment manufacturing, construction machinery, agricultural machinery, power transmission and distribution, construction, etc. Suki products are quality approved and to ensure consistently high standards, we test all our products in our own laboratory and also work closely with an independent testing institute.  Rest assured that our products are extremely durable and meet the high standards expected by our customers.