براغي غطاء مقبس 1/4-28 × 1-3/4 بوصة | محرك سداسي | حبيبات نايلون | ملولبة جزئيًا | فولاذ سبائكي أسود حراري (100/عبوة)

The nylon pellet locking feature is a lifesaver on my milling machine jig—no more vibration loosening. I had to use an Allen key, but the hex drive seated perfectly on the first try. These feel sturdier than the standard hardware I was using before.

The black oxide finish looks sharp on my jig, and the nylon pellet holds position even after repeated adjustments. Pack of 100 means I’ll have spares for a while—threads cut clean into aluminum without binding.

I needed partially threaded screws for a jig I was building, and these 1/4-28 x 1-3/4" ones worked perfectly—the nylon pellet held tight without stripping. The black oxide finish also gives them a nice, durable look on the tooling.