#4-40 × 1/4" براغي ذات رأس مقبس | محرك سداسي | رقعة نايلون | ملولبة بالكامل | سبيكة فولاذية مؤكسدة حرارياً سوداء (300/عبوة)

I needed some small socket cap screws for a jig I was building, and these #4-40s fit perfectly with their hex drive and nylon patch that holds them in place. The black oxide finish looks clean and professional on the steel.

The nylon patch on these screws is a nice touch—they held firm on my jig fixture after a few rounds of assembly and disassembly. The black oxide finish looks clean and durable for the price, and the hex socket drive made installation straightforward with a standard driver.

The hex socket drive on these #4-40 screws gives a much better grip than a Phillips head, and the black oxide finish looks clean on my jig. They snugged into the threaded holes perfectly.