Nut is a nut, and bolt or screw fastening screw together to play the role of parts, all the production machinery must be an original. Nut variety, we have a common national standard, British standard, American standard, nut on the subject. nut according to the different materials, divided into carbon steel, high strength, stainless steel, steel and other major types according to different product attributes corresponding to the standard number of countries are divided into ordinary, non-standard, (old) national standard, the new national standard, American, British, German standard. Different sizes, ranging into different thread specifications. The general national standard, German standard with the M for (for example, M8, M16), American, British or # then use that size fraction (eg, 8 #, 10 #, 1 / 4, 3 / 8). 2, the nut is closely connected to machinery and equipment parts, threaded through the inside, the same size nut and screw, to connect together, such as M4-0.7 only with the nut screw with M4-0.7 (in the nuts , M4 refers to the nut inside diameter of about 4mm, 0.7 refers to the distance between two threads teeth as 0.7mm); US-made products too, such as the nut 1/4-20 and 1/4-20 screw with only ( 1 / 4 refers to the nut inside diameter of about 0.25 inches, 20 refers to every inch, there are 20 teeth). Types of carbon steel or stainless steel nut self-locking nut nut nut locking nut screw nut claws Insurance rod nut self-locking hex nut screw connection cap nut with a dedicated ground screw crown-shaped thin hexagonal nut nut nut rings fine tooth all-metal hexagon flange nuts all-metal hexagon flange nuts fine tooth non-metallic insert hex flange locknut fine thread hex nut welded flange hex nuts square nuts welded fastening nut flush-mounted circular nut with a slot hole circle round nut with nut side of the face with a small round hole circle nut nut nut ring nut wing nuts round copper and lead-free copper inlaid bronze series of copper nut brass knurled nut nut nut with embedded copper alloys such as injection molding copper nut nut nut and other series of zinc-copper alloy locknut principle: DISC-LOCK locking nut is composed of two parts, each part has a staggered cam, wedge design because of the internal oblique angle of the slope is greater than the bolt nut point of view, this combination they bite into one tight overall, when vibration occurs, DISC-LOCK locking nut protruding part of each dislocation, resulting in uplift of tension, so as to achieve the perfect anti-loosening effect. The integrity of the main features of easy to install easy removal without gasket can be reused in carbon steel with 8.8, 10.9, and other high-strength bolts used in conjunction with the U.S. military through-MIL-STD 1312 Vibration Test7.Results by Junker Test test test Detection by Dynamic Test Applications Automotive - cars, trucks, buses compressor building wind power generation equipment machinery industry, agricultural machinery, foundry equipment, drilling equipment, mining, military shipbuilding industry oil drilling rig (onshore or offshore) transmission utility rail metallurgy equipment commonly used in the national standard rock hammer nut nut common national standard GB41 Ⅰ-type hexagonal nut - C grade GB6170 Ⅰ-type hexagonal nut - A, B grade GB6171 Ⅰ-type hexagonal nut - fine tooth-A, B grade GB6172 Hexagon thin nut - A, B grade - chamfer GB6173 Hexagon thin nut - fine-tooth-A, B grade GB6174 Hexagon thin nut - B Class - no chamfer GB6175 Ⅱ type hexagon nut - A, B grade GB6176 Ⅱ type hexagon nut - fine tooth -A, B grade GB6177 Hexagon flange nuts-A level GB56 hexagon thick nuts GB1229 large hexagon nuts (with high-strength steel) nut material Material: carbon steel, stainless steel, copper, alloy and other nuts introduce Edit this paragraph embedded using a variety of embossed wire nut production (usually lead brass, such as H59, 3604,3602) made of copper nuts, we embedded into daily contact with knurled brass nuts are made of precision automatic lathe. Knurled nut embedded copper reference standard from the national standard GB/T809. Embedded copper knurled nut is the main injection practices, heating or embedded directly inside the plastic injection mold, injection mold if using, PA / NYLOY / PET melting point above 200 ° C in the embedded nuts are hot melt into the plastic parts quickly changed after the high temperature, injection molding, rapid cooling and crystallization of hard plastic body, if the temperature is still in the high-temperature embedded in the nut, it may be down to the brass nut in contact with plastic parts, cracks began to loose or . So embedded in the plastic nut is used instead of brass nut carbon steel nuts. Embedded copper lines outside the knurled nut, there are two ways forming, one pull of raw materials is the use of copper in the device after forming flower production, the general pattern of this approach road to pull ruled, and the other is the use of copper circle of light directly in the production process while tapping edge embossing, this processing method can produce some non-standard size of brass knurled nut, brass nut embedded in the shape can be embossed with the user options, such as textured, character embossed, embossed herringbone pattern and other rolling road. Brass nut and use the other term copper nut, also known as embedded inlaid copper nut or nut and plastic embedded nut, according to the use of different methods is divided into hot-melt with copper nuts, copper nuts hot, embedded copper brass nut nut and ultrasonic The products are widely used in cell phone case / pen dollars this case / injection molding / plastic parts of the inserts, as a female use generally cylindrical embossing. to prevent sliding. Series of stainless steel nuts hex nuts (GB6170/DIN934), thin nuts (GB6172/DIN439), heavy nut (metric, U.S.), nylon lock nut (DIN985-DIN982 thick), all metal locking nut (DIN980M), cover type nut (DIN1587), flange nuts (GB6177/DIN6923), flange nuts nylon locking nut (DIN6926), square weld nuts (DIN928), Hexagon weld nuts (DIN929), butterfly cap (GB62, DIN315, U.S.) , K caps. Specifications: M1.6-M64 steel nuts hex nuts Series (GB6170/DIN934, GB6175), flange nuts (GB6177/DIN6923) Round nut (GB812), small round nut (GB810), US-made square nut, hex nuts US-made (ANSI / ASME B18.2.2), heavy nut (metric, U.S.). Specifications: 5/16-4. "