S-440-1CZ | صواميل PEM ذاتية التثبيت #4-40 | صلب (200 / عبوة)

The #4-40 threads cut cleanly into my sheet metal project and held tight without stripping. The steel finish feels robust, and the self-clinching action was surprisingly easy to install. Exactly what I needed for a secure threaded fastening point.

The steel construction gave these a nice solid feel when installing, and the grip on the #4-40 threads is precise and secure. Exactly what I needed for thin sheet metal fastening.

Pressed these into a thin aluminum panel with a standard arbor press and they seated perfectly flush. The #4-40 threads are clean and consistent across all 200 pieces in the package.