WF-N021 is a closed-end bulge acorn lug nut designed for secure wheel fastening on passenger vehicles and other automotive applications. It combines reliable mechanical fastening with a refined appearance through its precision-engineered Bulge Acorn profile. The enlarged seating area helps distribute clamping pressure more evenly and supports stable wheel installation. The closed-end construction helps prevent rainwater, dirt, and road salt from entering the threaded area, reducing corrosion exposure to the wheel studs. A multi-layer chrome plating process provides a bright, mirror-like finish while enhancing surface corrosion resistance and overall visual appeal.
| NO. | HEX | HEIGHT |
| 1 | 17mm | 29mm |
| 2 | 19mm | 29mm |
| 3 | 17mm | 35mm |
| 4 | 19mm | 35mm |
High-Strength Alloy Steel: High-quality cold-heading carbon steel or alloy steel is selected as the base material to provide suitable tensile strength and yield strength for wheel fastening applications.
One-Piece Cold Heading: Multi-station cold heading technology is used to form the lug nut in an integrated process, helping maintain precise threads, consistent material density, and improved fatigue resistance.
Heat Treatment: Controlled quenching and tempering are applied to relieve internal stresses and achieve the required mechanical properties, with strength requirements aligned with applicable SAE Grade 8 or ISO 10.9 specifications where specified.
Multi-Layer Chrome Plating: The surface undergoes copper, nickel, and chrome plating in sequence. The finished coating is evaluated through Neutral Salt Spray (NSS) testing to provide improved resistance to corrosion and coating deterioration.
Wheel Modification & OEM Upgrades: Suitable for upgrading or replacing lug nuts on aluminum alloy and steel wheels used on passenger cars, SUVs, and light-duty trucks.
Harsh Climate Conditions: The closed-end design helps limit exposure of the threaded area to rain, snow, road salt, and de-icing chemicals, making it suitable for wet, snowy, coastal, and cold-weather environments.
Aftermarket Repair & Maintenance: Suitable for automotive repair shops, tire service centers, and DIY vehicle owners as a replacement option when installing or maintaining vehicle wheels.
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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