Service HotlineGenerally, we have to divide the fine thread nut and the coarse thread nut first, but in fact, no matter what kind of fine thread, coarse thread, their specifications are the same, their specifications are M3, M4, M5, M6, M8, M10, etc. . But there is another kind of hexagonal nut, which is divided into English and American, which is only a different national standard. Made in China, it is called the national standard hexagon nut
Related Specifications of Automobile Welding Nuts (Square Nuts) Serial Number Standard Number Name (English) Name (Chinese) Remarks 1 MS440014 NUT,WELD Welding Square Nut M8 2 MS440013 NUT,WELD (6) Welding Square Nut M6 3 MF445605 NUT,WELD (10 ) welding square nut M10 4 MU442002 NUT,WELD welding square nut M6 parking brake handle 5 MB077464 NUT,WELD welding square nut for seat belt welding square nut 6 MB040348 BOLT WELD (10X22) welding bolt M10×22, bearing surface 7 MF198353 BOLT,WELD (6X14) Weld bolt M6×14, end face 8 MR236366 NUT (12) Nut M12 Suspended trailing arm mount 9 MS440015 NUT,WELD (10) Weld square nut M10 10 PW832525 BOLD WELD 7/16 UNF Weld bolt 7/16 For seat belt, bearing surface 11 MB528563 STUD,WELD Welding stud M6×20 12 MS440066 NUT,WELD (5/16=18UNC) Welding square nut 5/16 Child safety system 13 MS440018 NUT, WELD (6) Welding square nut M6 14 MF198375 BOLT,WELD (8X30) Welding stud M8×30 15 MF198038 BOLT, WELD (6X25) Welding bolt M6×25, bearing surface 16 MR236467 NUT (12) Welding square nut M12, for engine mount 17 MF140024 BOLT, FLANGE (8X18) Hexagon flange bolt without 3D 19 MF198036 BOLT,WELD (6X20) Weld stud M6×20 20 MF198034 BOLT,WELD (6X16) Weld bolt M6×16, bearing face 21 MS440012 NUT,WELD (5) Weld Square Nut M5 22 MB343340 BOLT,WELD (8X26) Welding Bolt M8×26, Bearing Surface 23 MB138471 STUD,WELD Welding Stud M8×46, Bearing Surface 24 MS190066 BOLT,WELD (8X16) Welding Bolt M8×16, Bearing Surface, NO 3D 25 MS240145 BOLT,WASHER ASSEMBLED (8X20) BOLT AND WASHER ASSEMBLY NO 3D 26 MB281149 NUT,WELD(6) WELD BOLTS M8, NO THREADS REQUIRED FOR BEARING 27 MF445603 NUT,WELD (6) Welded square nut M6 Reinforcing plate for rear door lock 28 MS190068 BOLT,WELD (8X20) Welded bolt M8×20, bearing surface 29 MU431507 NUT,WELD Welded square nut M8 for door hinge installation 30 MS240121 BOLT,WASHER ASSEMBLED (6X16) Bolt and washer assembly M8 for fuel filler cap 31 MS100221 BOLT,FLANGE (6X12) Flange face bolt M6 for fender mounting 32 MB344675 STUD,WELD Weld stud M6×10
screw is a tool that uses the physical and mathematical principles of the circular rotation and friction of an object to fasten the mechanism of the object step by step. When using screws to fasten objects and parts, it is often necessary to use screws with spring washers and flat washers to lock and fix the relative position, so as to improve the stability of the fastening connection and make the screws less prone to loosening. However, in the prior art, the method of manually inserting the spring washer and the flat washer in sequence is generally used, which not only increases the workload of the staff, but also makes the installation efficiency relatively low. On the other hand, the traditional screw with a gasket only has the function of fixing, Without the function of sealing, it cannot be applied to special equipment such as oil tanks and airtight cabins. Therefore, it is necessary to design a screw that can reduce the workload and have its own sealing structure.
In many national standards, there will be a division of intensity levels. Combination screws are no exception. The strength grade of the combined screw is divided according to the material of the screw wire and the hardness index of the screw wire. General combination screw materials are divided into stainless steel and iron, stainless steel is divided into stainless steel 201, stainless steel 304 and stainless steel 316 and so on. Iron is divided into three types: low carbon steel, medium carbon steel, and high carbon steel. Carbon steel combination screws refer to iron combination screws. Generally, iron combination screws are classified into grades 4.8, 8.8, 10.9, and 12.9. However, the combination screws of grade 10.9 and grade 12.9 are rarely used in the market, so we will not talk about them here. And the combination screws on the market are more commonly used combination screws of grade 4.8 and 8.8. 4.8 grade combination screws are generally made of 1010A screw wire rods. After the screw wire rods are beaten into screws, they are combined with spring flat washers. After production, this 4.8 grade combination screw does not need to be hardened. Its hardness can reach 4.8. 8.8 grade combination screws are generally made of screw wire 10B21 piers. After the screw and wire piers are made into screws, they are equipped with spring washers and flat washers. They can pass through the automatic elastic flat washer machine to rub the three pieces together. Fasten the spring-flat washer combination on the screw, and the spring-flat washer will not fall off. After the combination screw is produced, it needs to be hardened to make the hardness reach 8.8. After the hardness reaches 8.8, we need to take it for electroplating. In order to prevent hydrogen embrittlement of the spring washer in the 8.8-level combination screw with added hardness, it is easy to break. In this way, we have to perform hydrogen removal treatment on the hardened combined screws, and only after the hydrogen removal can be plated. In short, there are many kinds of standard grades of combined screw strength, but generally only two types are used in the market, one is the 4.8-level combined screw strength, and the other is the 8.8-level combined screw strength. 4.8-level combination screws are the most used in the market and customer needs, and have a wide range of applications. As for the standard strength of 8.8-level combination screws, we generally refer to 8.8-level hexagon socket head combination screws, 8.8-level pan head combination screws, and 8.8-level external hexagon combination screws. These three are more commonly used.
The fixing screw proposed by Guangdong Yueluo Hardware Industry Co., Ltd. has a screw body 1, and the axial surface of the screw body 1 is formed with extending screw teeth 6, and the axial surface is a column along the central axis direction of the cylinder of the screw body 1. The body surface has a hemispherical screw tail 7 at the bottom, and a screw head 2 at the top. The upper surface of the screw head 2 is provided with a slot (not shown). The screw body 1 is composed of the upper tapered rod 4 and the lower cylindrical screw 5. The tapered rod 4 is an inverted cone, the diameter of its circular upper surface and the diameter of the screw mounting hole 10. equal. The fixing screw also has a washer 3, the washer 3 is arranged between the screw head 2 and the screw body 1, the lower surface of the cylindrical washer 3 has a number of teeth 8, the teeth 8 are along the The upper surface of the inverted cone of the tapered rod 4 and the edge of the washer 3 are connected to form a straight convex strip 15 extending outward; the convex strip 15 can also be designed in an arc shape. The fixing screws for installation proposed by Guangdong Yueluo Hardware Industry Co., Ltd. can be made of metal materials in one piece. As shown in Figure 3, it is a schematic diagram of the installation of Guangdong Yueluo Hardware Industry Co., Ltd. for PCB board fixing. When installing, first pass the screw body 1 of the fixing screw through the mounting hole 10 and the copper column 11 provided on the PCB board 9, so that the tail 7 of the screw reaches the mounting hole 13 on the casing 12, and then use the tightening tool 14 to insert the screw At the notch on the top of the head, forcefully press the inverted cone design taper rod 4 of the screw body 1 into the mounting hole 10, so that the tail 7 passes through the mounting hole 13. Due to the outer diameter D at the bottom of the taper rod and the screw mounting hole The aperture size of 10 is equal, and the fixing screws are pressed and fixed, so that the PCB board 9 can be automatically corrected in the process of fixing its front, back, left and right deflections, and the accuracy of the installation position of the PCB board 9 can be ensured. As shown in Figure 4, after the fixing screw is screwed into the casing, the washer 3 is fully contacted and pressed on the PCB board 9, and the PCB board 9, the copper column 11 and the casing 12 are firmly connected together without sliding. . The teeth 8 on the washer 3 are in full contact with the surface of the PCB board 9, so that a ground wire path is set up between the PCB board 9 and the casing 13 by the metal fixing screw 1, thereby ensuring that the PCB board 9 is fully grounded , the design of the teeth 17 on the washer 3 also has a non-slip function. The fixing screws for installation designed by Guangdong Yueluo Hardware Industry Co., Ltd. make use of the cooperation, friction and electrical conductivity in the mechanical connection, which fully guarantees the firm installation of the PCB board and the chassis and the good grounding of the PCB board. Moreover, the ellipsoid tail of the fixing screw The surface is relatively smooth, even if the mounting holes are exposed, it will not cause scratches on the hands and desktop. The above is only the embodiment of Guangdong Yueluo Hardware Industry Co., Ltd., and does not limit the scope of Guangdong Yueluo Hardware Industry Co., Ltd., any equivalent structure made by using the contents of the description and drawings of Guangdong Yueluo Hardware Industry Co., Ltd. or etc. Effective process transformation, or direct or indirect application in other related technical fields, are also included in the protection scope of Guangdong Yueluo Hardware Industry Co., Ltd.
We have many years of experience in the production and sales of screws, nuts, flat washers, etc. The main products are: lead screw butt screw, 304 national standard pull-out screw, handle screw bolt, internal and external teeth aluminum column and other products, we can provide you with suitable products for you. Fastener Solutions.
