Service HotlineThe produced screws, due to unreasonable production aspects, are likely to cause quality problems in the screws. During production, many screw quality problems may be found upon delivery. Let's talk about the quality problems often encountered by screws and the reasons for the quality problems, and finally put forward some solutions. 1. The head of the screw is deformed and the head is crooked. The possible reasons are the poor installation of the first punch of the screw die and the improper adjustment of the machine. 2. The head of the screw is not round. The reason is that the selection of the first punch of the screw mold is improper or the first punch is not full enough. 3. The screw has burrs or burrs. The reason is the poor forming of one punch, mainly caused by too large gap between punch and die hole or too short punch. 4. The screw head is cracked and the screw head is cracked. The reason may be that there is a problem with the quality of the screw wire itself, so before the screw wire is headed, the quality department must check it and use the potion. Especially the stainless steel screw wire, it is necessary to check that it is stainless steel 201 and that is stainless steel 304. It is also possible that a die is used incorrectly (such as a die with a hexagonal washer head for a pan head), and the viscosity of the lubricating oil fails. For the problem of the screw head, you can read the article written by Manager Zhu above - high-strength screw fracture or head crack detection. In this article, some problems encountered by the screw head and how to detect the screw head problem are clearly introduced [4]. The common quality reasons for screws are of course more than the above, this is only part of it. There are other quality issues, then Manager Zhu will talk about it. The above screw quality reasons are for reference. If you encounter these problems, you can try the solutions proposed.
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
As we all know, bolt and nut kits are commonly used fastening parts, but when ordinary bolt fasteners are used in a large number of parts, because the nuts and bolts are engaged by threads, manual or machine tightening is required, and during installation, It is easy to slip, and the bolts need to be operated in both directions, and a pair of bolts and nuts cannot be installed quickly, which reduces the installation efficiency.
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