LAC-440-2-MD | مثبت ذاتي الثني PEM #4-40 | فولاذ (100 / عبوة)

Installed these into some thin sheet metal and they seated perfectly with no stripping. The knurled collar grips tight enough that they haven't budged during assembly.

The steel construction feels solid for such tiny fasteners, and I was pleasantly surprised by how smoothly the self-clinching action works on thin panels. No stripping or cross-threading during my assembly, which is exactly what I needed.

Bought these for a small assembly job and the #4-40 threads bit cleanly into the sheet metal without any deformation. The steel finish feels sturdy, and the 100-count pack covered my run with a few spares to spare.