براغي تثبيت بنقطة كوب مقاس #4-40 × 1/16 بوصة | فولاذ سبائكي (50 / عبوة)

I needed these for a small repair on a gear shaft, and the alloy steel feels sturdy enough to hold tight under pressure. The cup point bites in nicely without stripping.

The hex socket fit perfectly on my driver, making these much easier to install than standard slotted set screws in tight spaces. Used a handful already to secure a gear to a shaft, and they held firm without stripping.

The socket drive on these #4-40 set screws made it a breeze to secure a pulley to a small shaft without stripping the head. The alloy steel feels sturdy enough for the job, and the cup point design seats nicely. I'm glad I picked up a pack for this repair.