How large is the bottom hole of the rivet nut? Bottom hole size table

1、 M2-M10 rivet nut bottom hole (installation hole Hole Size in Sheet+0.08) size introduction diagram:

2、 What size should the bottom holes of M2-M10 various rivet nut specifications be opened
As shown in the above figure:
1. The bottom hole of the fasteners with M2, M2.5 and M3 screw thread specifications should be about 4.25mm in size.
2. The bottom hole of M3.5 thread nut fastener should be about 4.75mm in size.
3. The bottom hole of rivet nuts with M4 thread specification should be about 5.4mm.
The bottom hole of the M5 specification nut should be approximately 6.4mm in size.
5. The bottom holes of M6, M8 and M10 rivet nuts should be about 8.75mm, 10.5mm and 14mm respectively.
3、 When opening bottom holes for various specifications of rivet nuts, attention should be paid to:
1. Punching technology is strongly recommended.
2. When opening holes, it is necessary to strictly control the size error of the opening, and the error of the opening size should not exceed 0.08mm, otherwise it will seriously affect the riveting effect of the riveted parts.