براغي تثبيت مخروطية #6-40 × 3/8" بوصة | فولاذ سبائكي (250/عبوة)

Used a few to secure a motor shaft in a tight blind hole, and the hex socket let me get enough torque without stripping. The alloy steel feels really solid, no deformation even under pressure.

The cone point bites perfectly into the shaft, and that hex drive lets me really crank it down without stripping. For such a small screw, the alloy steel feels reassuringly solid.

I needed a truly tiny set screw for a custom jig, and these #6-40 cone points fit perfectly with their knurled cup grip under high torque. The alloy steel feels rock-solid, and the hex socket drive makes adjustments in tight spots a breeze. Worked exactly as I hoped for my precision project.