How to distinguish true from false from spark plug hex nut

In daily life, the spark plug hex nut is an important part of every motor vehicle, so it is very important to distinguish the true and false spark plugs. Let’s talk about how to distinguish the spark plugs.
1 The welding point of the counterfeit NGK spark plug hexagon nut is rough and not neat
2 The font of the ceramic part of the spark plug is gray-brown or blue, and the fake one is bright black (very important and easy to distinguish);
3 There is a production number on the outer packaging of each box, such as: 013115, 011010, and there is no fake product;
4 The glaze on the ceramic insulator on the surface of the counterfeit NGK spark plug hexagon nut is uneven (very important, the genuine product is extremely smooth);
5 The electrode and the metal shell of the counterfeit NGK spark plug hexagon nut are asymmetrical, and the ignition gap varies in size;
6. The discharge surface of the center electrode of a good NGK spark plug hexagon nut will be plated with platinum, which is obviously not possible with a counterfeit NGK spark plug;
7 The NGK logo on the outer packaging of genuine products is red, while fake ones are mostly black;
8 The metal part of the spark plug is silvery white, and the fake ones are mostly golden yellow;
9 The genuine spark plug hex nut has a clear production batch number on one side, while the fake one is not or fuzzy.
Definition of hex nut
Hexagon nuts are used in conjunction with bolts and screws to connect and tighten parts. Among them, type 1 six-purpose nuts are the most widely used. Grade C nuts are used for machines, equipment or structures with rough surfaces and low precision requirements; Grade A and B nuts are used for smoother surfaces and higher precision requirements. On the machine, equipment or structure. The thickness M of the type 2 hex nut is relatively thick, and it is mostly used in occasions that often require assembly and disassembly. The thickness M of the hexagonal thin nut is thin, and it is mostly used in occasions where the surface space of the connected parts is restricted.

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