External / internal tooth lock washer

The external / internal tooth lock washer is a specialised fastener that works in conjunction with a screw to prevent loosening under vibration. It is supplied in sizes ranging from M1.4 to M12 and length options from 3 mm up to 125 mm (3/16 in - 5 in). Both external and internal tooth profiles are offered, and the washer can be combined with a variety of head types such as pan, hex, truss and fillister. The product is marketed as a ready‑to‑assemble unit for mechanical fastening applications.

Bright Year Co., Ltd. provides the washer in four material families: carbon steel, alloy steel, stainless steel and brass. The items comply with recognised standards including IFI, JIS, ISO, DIN and BS, which ensures compatibility with global engineering specifications. Typical carbon‑steel versions are heat‑treated to a Rockwell B hardness of 85‑95 and exhibit tensile strengths of 600‑900 MPa. Standard industry practice adds a zinc plating finish for corrosion resistance and a dimensional tolerance of ±0.02 mm on the outer diameter.

The lock washer is commonly used by OEMs in automotive, machinery and construction sectors where vibration resistance is critical. Buyers often request custom tooth patterns or head styles, and the supplier states that new styles and customer designs are welcome. Trade terms such as minimum order quantity, lead time and payment conditions are not disclosed in the listing and should be confirmed directly with the supplier. Packaging is typically supplied in polybags of 500 pieces, with FOB shipping options available upon request.

Bright Year Co., Ltd. is located at 5f, No.207-2, Xinshu Road, Xinzhuang District, New Taipei 24262, Taiwan. The platform lists the supplier with a harbour trust tier, indicating basic business verification, while the response rate shown is 0.00, so direct contact is advisable to confirm current capabilities. The company advertises the ability to produce new styles and custom designs for lock washers, suggesting a flexible manufacturing setup.

The supplier’s profile highlights a broad range of head types and material selections, which points to service for automotive, machinery and construction markets. No specific production capacity, certifications or quality system details are provided, therefore buyers should request material test reports and any applicable quality certificates before placing an order. Details such as minimum order quantity, lead time and payment terms are absent and must be clarified in negotiations.