Bulge conical open end is an open-style lug nut featuring a bulge-seat conical design, ideal for mounting standard and aftermarket wheels that require a larger conical contact surface. Its open-end structure accommodates varying wheel stud lengths, meeting diverse installation and application requirements. Typically manufactured from high-quality steel using precision cold-heading, turning, and threading processes, these nuts ensure dimensional stability and thread accuracy, while surface treatments enhance corrosion resistance. Characterized by reliable seating, even load distribution, and broad compatibility, they are widely used for passenger cars, SUVs, light vehicles, and aftermarket wheel applications. Available in a variety of thread specifications, seat sizes, lengths, and finishes, the product supports custom manufacturing—including OEM/ODM services and volume supply—based on customer drawings or samples to meet specific market needs for wheel fastening.
Ningbo Wheel Friends Auto Parts CO., LTD. is specialized in producing auto wheel accessories, product type are the wheel, nuts, bolts, Locking Nuts and Bolts, wheel spacer, Tire Valves, Wheel Sockets, Wheel Balancing Weights, Central Rings, etc.
With strong technical force, the company has the advanced production technology and testing equipments, the company insists on "quality first, innovation" the management ideas, by the good faith, "the product quality" strives for the subsistence, the company pays attention to the quality management and personnel, strict execution ISO/TS 16949 quality management standards. Constantly develop new products to meet the market demand. The company exported to Europe, the United States, Australia, The Asian, the Middle East and other countries and regions, favored by domestic and foreign customers.
Customer satisfaction is our development the greatest power ， provide the best value is our development objective, we sincerely welcome the customers from home and abroad to visit and guide and cooperate!
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Ningbo Wheel Friends Auto Parts Co., Ltd. is a large-scale specialized enterprise integrating design, production and technical services of automotive wheel accessories.
Tel: +86-13967466955
E-mail: michelle_goodluck@163.com
Add: Building 19, No. 22 Dutou Road, Liyang Town, Ninghai County, Ningbo City, Zhejiang Province, P.R. China
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