BSL® self-clinching nuts can be used for embedded self-clinching connections on automotive sheet metal, providing high-strength, high anti-rotation internal thread support for the fastening of other metal parts.
About self-clinching nuts
BSL® self-clinching nuts are divided into flanged self-clinching nuts and self-clinching self-clinching nuts.
| distinguish | picture | Structure and function | Installation Environment |
| Flanged type | 1）Concave flange and triangular rib anti-rotation tooth structure
2）After riveting, the contact surface of the sheet metal is large and the anti-rotation performance is high 3）Specification: M6-M12 |
Suitable for thicker sheet metals of 2.0-5.0mm, with high requirements for anti-rotation performance and high connection strength | |
| Self-fastening | 1）There are dense sun teeth
2）The sheet metal contact surface is small after riveting, and the sun gear can automatically stop when tightening the bolts. 3）Specification：M3-M10 |
Suitable for thinner sheet metal with a thickness of 0.8-3.2mm, with average anti-rotation performance and connection strength |
The rivet nuts should be subjected to quenching and tempering heat treatment to obtain the required connection strength.
| Specification code | D | d | L | dk | k | M | L1 | d0 | h1 | h |
| Nominal | Max | Max | Max | Max | Max | refer to | refer to | |||
| B2021-060115 | M6 | 9.9 | 11.5 | 16.1 | 3.8 | 8 | 3 | 10.0-10.3 | 8.5 | 0.6-3.0 |
| B2021-080130 | M8 | 13 | 13 | 21.1 | 4.8 | 9.2 | 4 | 13.1-13.3 | 9 | 0.8-3.0 |
| B2021-100160 | M10 | 15.3 | 16 | 28 | 6 | 11.7 | 4 | 15.4-15.6 | 10.5 | 0.8-3.0 |
| B2021-120180_P150 | M12×1.5 | 16.4 | 18 | 28.1 | 7.5 | 13.2 | 4.5 | 16.5-16.62 | 13 | 0.5-3.0 |
“B2021” is a flanged rivet nut, “060115” is a thread size M6, and the total height L = 11.5mm. The suffix “-P150” indicates a fine pitch of P = 1.5mm.
| Strength level | 螺纹规格D
（mm） |
Thread specification（N）Min | Push force（N）
Min |
Rotational torque（N.M）
Min |
| 8class | M6 | 17200 | 1000 | 10 |
| M8 | 31800 | 1500 | 25 | |
| 10class | M10 | 60300 | 2000 | 45 |
| M12×1.5 | 97800 | 2000 | 79 |
| Material Category | Material grade | Material Standards | Surface treatment and protection level
(Neutral salt spray test conditions) |
| Medium Carbon Steel | SWCH35K
（10class） |
JIS G3507-1 | 1）Galvanized: 72H no white rust
2）Zinc-nickel alloy: 720H no red rust |
1.1 Installation of flanged riveted nuts
1) Select riveting equipment and riveting tooling (punch and punch seat) with matching pressure, and set riveting parameters (pressure, speed) according to the equipment operating instructions;
2) Perform riveting test on the test sheet metal, as shown in step 1 below.
3) Observe whether the clamping state of the product is normal after installation.
4) (To determine whether the installation fails, please refer to the following article – Product installation failure mode picture)
For automatic feeding and automatic positioning riveting equipment, it is necessary to verify the direction of the product feeding system.
Before installation, confirm whether the size of the punch and punch seat matches the product, and whether the punch and punch seat are aligned. During installation, place the product in the punch seat positioning hole, insert the mounting hole of the mounting plate into the product riveting cylinder, set the equipment speed, pressure, and travel stop point, start the riveting equipment, and apply pressure to the punch in the vertical direction until the deformation band of the product expands and deforms and is fully engaged with the mounting plate.
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