What Is Lock Nut?

The lock nut is a nut widely used in machinery and other industries and tightens the close nipple or other pipe fittings. Its working principle is to use the friction between the nut and the bolt for self-locking. However, the reliability of this self-locking will be reduced in dynamic loads. On some important occasions, we will take some anti-loose measures to ensure the reliability of the nut locking.

The anti-loosening effect of the lock nut mainly depends on the interaction force between the nut and the bolt thread. There are many ways to improve the interaction force between meshing threads, such as structural improvement of nut threads, nylon roughening of nylon nuts, and surface treatment of threads.

Lock Nut Type:

1, The first is to use two identical nuts to screw on the same bolt and add a tightening torque between the two nuts to make the bolt connection reliable.

2, The second type is a special lock nut, which needs to be used together with a lock washer. The special lock nut is not a hexagonal nut, but a middle-round nut. There are 3, 4, 6, or 8 gaps on the circumference of the nut (depending on the size of the nut and the product series of the manufacturer). Several notches are not only the focus of the tightening tool but also the entry point of the locking washer.

3, The third type is to drill through threaded holes from the outer surface of the nut to the inner thread surface (usually two, distributed at 90 on the outer surface), used to screw in small diameter countersunk screws, the purpose is to thread Apply a centripetal force to prevent the lock nut from loosening. A lock nut with better quality on the market is inlaid with a small piece of copper that is consistent with the thread of the lock nut on the inner surface of the nut to avoid direct contact between the radial jackscrew and the locked thread and damage the latter. This kind of lock nut has gradually begun to be applied in the occasion of the shaft end locking of rotating parts, such as the anti-loosening of the bearing at the mounting end of the ball screw.

4, The fourth type of lock nut is composed of two parts, each part has a staggered cam, because the internal wedge design slope angle is greater than the bolt nut angle, this combination will be tightly bitten into a whole, when vibration occurs When the anti-loosening nut protruding parts are staggered, the lifting tension is generated, so as to achieve the perfect anti-loosening effect.

5, The fifth type is structural anti-loosening. Through the design improvement of the thread structure, a self-locking function is obtained without the help of other external factors. Therefore, its applicability is wider than the above-mentioned methods, and the requirements for the environment are also lower. There are many types of locknuts, such as nylon nuts and flange nuts. In short, this kind of locknut is used to prevent loosening. Twist the nut onto the screw, screw, bolt, etc., until it will not come loose. They can be actively connected together to make them firm and stable to a high degree.

Hebei Sanvo Steel Pipe Fittings Manufacturer Has A Kind Of Lock Nut, Which Is A Stainless Steel Lock Nut

Stainless steel lock nut is a kind of stainless steel pipe fittings with hexagonal shape and made of high-quality 304 stainless steel, which is extremely corrosion-resistant. And, the hex lock nut is widely used in industrial-grade daily living pipeline connections, such as oil well, gas, fire, water pipe connection.

lock nut

Hebei Sanvo Also Manufactures And Exports Other Threaded Pipe Fittings

Hebei Sanvo is a manufacturer and exporter of steel pipe fittings, supplying carbon steel pipe nipples/couplings, stainless steel pipe nipples/couplings, and stainless steel threaded pipe fittings of American Standard, German Standard, and British Standard. Specific products include galvanized steel pipe nipples/couplings, black steel pipe nipples/couplings, stainless steel threaded elbows, pipe tees, lock nuts, pipe caps, pipe plugs, hose nipples, hex nipples, pipe bushing, etc.

These threaded steel pipe fittings can be customized according to drawings and samples or customer requirements. Customers in need are welcome to consult and look forward to your inquiry and cooperation with you.

threaded steel pipe fittings

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