Colored Flat Metal Washers

Colored flat metal washers change the friction characteristics between the washers and the contact surface through surface color coating, thereby significantly improving the accuracy of torque control. According to the friction coefficient test according to the ISO 16047 standard, the total friction coefficient of the red and blue coated gaskets under the same lubrication state was 0.12 and 0.13 respectively, while the uncoated metal gasket reached 0.21. This change compressed the dispersion of the preload force from plus or minus 18% to within plus or minus 6%. One hundred consecutive tightening tests for each color batch also showed that the coefficient of variation of the torque coefficient dropped from 0.09 to 0.03, which means that the clamping force consistency of the connection pair has been improved nearly three times.

Colored flat washers also bring quantifiable improvements in warehouse management and chemical resistance. Historical records from a fastener distribution center show that after the introduction of color coding, the average number of errors made by operators picking washers dropped from fifteen to two per month, while the average time it took to find a specific specification was reduced by 68 percent. Gaskets of six different colors were immersed in an acidic solution with a pH value of 3.5 for 500 hours at the same time. The cross-hatch adhesion test conducted afterwards showed that the adhesion level of all coatings still maintained the highest level zero, with only slight gloss changes and no blistering or peeling. This ensures that in corrosive environments such as chemical plants and electroplating workshops, the color markings can still provide maintenance personnel with an intuitive and reliable basis for distinguishing specifications for a long time.

Obtain drawings from clients or produce drawings based on their samples or specifications.

The drawings, product raw materials, surface treatment, and other details are attested to by both parties.

Provide a quote, ensure that the order quantity is accurate, and include all relevant details,

such as the terms of payment, the terms of trade, the type of packaging, etc.

Follow the original drawings and samples exactly when producing the goods.

It was carefully packaged and delivered to the clients following a final inspection.

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