Premium Spring Washers Supplier
Insoer is a trusted spring washers supplier with 18+ years of manufacturing excellence, serving global brands along the Belt and Road Initiative. We specialize in premium lock washers, serrated washers, and custom fastening solutions with ISO 9001 certified quality.
Our state-of-the-art facility produces 200+ million pieces annually across 8 production lines, delivering precision-engineered spring washers from materials including stainless steel (304/316), carbon steel, and specialty alloys with advanced surface treatments.
Premium Quality Standards
±0.1mm precision tolerance with comprehensive quality control from raw materials to final inspection
Rapid Manufacturing
24-hour sampling service with 3-day mass production capability for urgent spring washer requirements
Global Distribution
Serving international markets with reliable supply chain and $6M+ annual procurement capacity
Company Statistics
Custom Solutions Await You
From rapid prototyping to large-scale production, we deliver precision-engineered fasteners tailored to your specifications.