MS51021-32 | براغي ضبط عسكرية | محرك سداسي (100 / عبوة)

Finally got around to using these on a project where I needed to secure a pulley to a shaft, and the hex socket drive made installation a breeze with no stripping. The mil-spec quality really shows in the precise threading and consistent finish across all 100 pieces.

Found these set screws perfect for locking a pulley collar onto a shaft—the hex socket drive seated cleanly without stripping, even when I torqued them down in a tight spot. A whole pack of 100 means I've got spares for future projects, and they've held firm against vibration so far. Exactly what I

The hex socket drive grips snugly, so these set screws hold fast on my shaft without slipping. Each one feels precisely machined, and the 100-count box is solid value for multiple projects.