2. Product Features
1. High strength, anti-deformation
Using high-strength materials such as 304/316 stainless steel, 45# carbon steel, H62 copper alloy, etc., after heat treatment and strengthening, the tensile strength can reach 500-1200MPa, and it can still maintain a stable shape under high load conditions to avoid affecting the tightening effect due to extrusion deformation.
2. Multi-scenario adaptation, diverse functions
 Anti-loosening type: spring washers and serrated washers effectively prevent bolts from loosening under vibration environments through elastic deformation or tooth bite;
 Sealing type: copper and rubber-coated metal washers can fill gaps to achieve sealing of liquid and gas media to prevent leakage;
 Adjustment type: flat washers can accurately adjust the spacing between components by superimposing different thickness specifications to ensure assembly accuracy.
3. Corrosion resistance and long life
Stainless steel washers are passivated, carbon steel washers are galvanized and nickel-plated, and copper alloy washers have natural corrosion resistance and can be used for a long time in harsh environments such as moisture, acid and alkali, with a service life of 8-10 years.
4. Standardized production and complete specifications

Produced in accordance with international standards such as GB, ISO, and ANSI, it provides multiple nominal sizes from M2 to M100, with a thickness range of 0.5-10mm, and supports customized special specifications and non-standard sizes. Some common specifications are as follows:

Type	Material	Nominal size (mm)	Thickness (mm)	Main application scenarios
Flat washer	304 stainless steel	M3 - M36	0.5 - 3	General tightening pressure dispersion
Spring washer	65Mn spring steel	M4 - M48	0.8 - 4	Vibration equipment loosening prevention
Copper washer	H62 copper alloy	M6 - M52	1 - 5	Pipeline sealing

III. Product Details
1. Material Type
Stainless steel: 304 stainless steel has good comprehensive corrosion resistance and is suitable for general industrial environments; 316L stainless steel adds molybdenum and performs well in strong corrosion scenarios such as seawater and chemical industry.
Carbon steel: 45# carbon steel has high strength after quenching and tempering treatment, and surface galvanizing (hot-dip galvanizing/electrogalvanizing) can improve rust resistance, and is commonly used in construction and machinery manufacturing.
Copper alloy: H62 brass has good electrical and thermal conductivity and corrosion resistance, and is suitable for sealing and connecting electrical equipment and pipeline systems.
2. Manufacturing process
Stamping: Using precision molds and high-speed punching machines, large-scale and efficient production of washers is achieved, and the dimensional accuracy is controlled within ±0.1mm.
Surface treatment: Carbon steel washers are galvanized and Dacromet-treated; stainless steel washers are passivated and electrolytically polished; copper alloy washers can be tinned and silver-plated to improve protection performance and appearance quality.
Special processing: The sealing gasket is embedded in the rubber layer through molding, and the anti-loosening gasket is heat-treated to enhance elasticity and ensure functional reliability.
3. Quality inspection
Dimension inspection: Use calipers, micrometers, projectors and other equipment to fully inspect the inner diameter, outer diameter and thickness of the gasket to ensure that it meets the standard tolerance requirements.
Performance inspection: Evaluate material strength through hardness test and tensile test; verify corrosion resistance through salt spray test (≥72 hours); and ensure anti-loosening effect through elasticity test (spring gasket).
Appearance inspection: Use visual inspection equipment to check whether there are defects such as cracks, burrs, scratches, etc. on the surface of the gasket to ensure product quality.