1. Increasing Contact Area

• Function: Flat washers can increase the contact area between the nut or bolt and the component being connected. This helps distribute the pressure more evenly and prevents damage to the surface of the connected component due to excessive localized pressure.
• Example: When fastening thin metal sheets or plastic parts, a flat washer can prevent the sharp edges of the nut or bolt from directly contacting these materials, avoiding scratches or damage to the surface.

2. Preventing Loosening

• Function: Flat washers provide a smooth contact surface, reducing the risk of loosening caused by uneven surfaces during tightening.
• Principle: By filling in minor surface irregularities, flat washers ensure that nuts or bolts are evenly loaded, thereby enhancing the stability of the connection.

3. Corrosion Prevention

• Function: Flat washers can prevent direct contact between the nut, bolt, and the connected component, thereby reducing the possibility of electrochemical corrosion.
• Example: When connecting stainless steel bolts to carbon steel parts, using a flat washer can prevent galvanic corrosion between the two materials, extending the service life of the connection.

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Hunan Jiashan Hardware Tech as a branch company of J AND R METALWORK,established in 2007 and located in Changsha, Hunan, China.After almost 17 years management development and technical improvement, Jiashan is willing to be a leading supplier in hardware industry. Meanwhile, we are one of member of Hardware industrial Association and Green energy industry Association.

Jiashan is specialized in milling,turning,lathe 5 axis cnc machining parts,injection molding parts,alumium extrusion parts,laser cutting parts,sheet metal fabrication parts,wire edm parts,vacuum casting parts and fasteners.Those parts are widely service for electric vehicle,solar system,wind power system and construction machinery industry.

During17 years domestic and abroad market investigation, Jiashan's products are sold to many countries and regions including the North America, Europe, Australia, the Middle East and Asia. With owned the advanced cnc machinee, milling machine, polishing machine, stamping machine etc. Jiashan is able to degsin and produce varies OEM parts with drawings or samples provided. Further more, Jiashan also can help to provide a whole solution for modularity R&D of electric vehicle and solar system .

By constantly strengthening our management and consummate the quality guarantee system.In 2023, Jiashan acquired ISO9001:2008 quality certification. Currently,the 5S management mode is implemented in the whole Jiashan system.

Best quality and best service is and will be always our toppest concern.