Flare-in nuts are a type of fastener used to join materials and are often used where quick disassembly and assembly is required. The use of rivet nuts requires drilling a hole, and the size and position of the holes have an important impact on the effect of rivet nuts. The following will introduce the standard for opening rivet nuts.
The standard for opening rivet nuts usually consists of the following aspects:
Opening diameter: The opening diameter of the rivet nut should correspond to the outer diameter of the nut. Unlike self clinching nuts, it is generally slightly smaller than the outer diameter of the nut. For nuts of different sizes, the diameter of the opening should also change accordingly. Generally speaking, the tolerance of the opening diameter of the rivet nut should be controlled within ±0.05mm.
Hole depth: The depth of the rivet nut opening should be suitable for the length of the nut, and at the same time, ensure that the nut has enough stretch after installation. Generally speaking, the tolerance of the opening depth of the rivet nut should be controlled within ±0.2mm.
Opening position: The opening position of the rivet nut should be aligned with the corresponding hole position of the material to be connected to ensure that the installation position of the rivet nut is correct. For large structural parts, the opening position of the rivet nut should be accurately measured and marked to ensure the accuracy of the installation.
Hole wall s

First screw the self clinching nuts into the threaded mandrel and apply the guaranteed working load according to the social regulations according to Table 1, and insist on it for 15s. The rivet nut should not be tripped or cracked. When using PEM rivet nuts, it is necessary to confirm the A scale and the corresponding tail number Z according to the thickness of the plate and the nut standard. The user selects according to the thickness of the plate and the tail number in the table. Pressure riveting screw is a new type of fastener applied to thin plate or sheet metal. The principle is to press the embossing teeth into the preset hole of the sheet metal. The diameter of the general preset hole is slightly smaller than the outer diameter of the pressure riveting screw. 
After pressure, the outer diameter of the pressure riveting screw is pressed into the plate to cause The periphery of the hole is plastically deformed, and the deformation is squeezed into the guide groove, thereby producing a locking effect. Riveting studs, also known as rivet studs or studs, are a kind of fasteners used in sheet metal, thin plates, chassis, and cabinets. Riveting studs have a hexagonal shape at one end and a cylindrical shape at the other end. There is an undercut in the middle of the side and the cylindrical shape, and its inner shape is an internal thread. The hexagonal head is pressed into the preset hole of the thin plate by a press to cause plastic deformation around the hole. Af