براغي رأس أسطواني 1/4-20 × 2 بوصة | محرك سداسي | كرة نايلون | خيط جزئي | فولاذ سبائكي مؤكسد حراريًا أسود (100/عبوة)

They fit snugly in my milling machine's T-slots, and the black oxide finish hasn't shown any wear after a dozen setups. The hex socket drive grips the Allen key nicely without slipping.

The partial threading is perfect for my jigs, letting me clamp materials tight without the threads chewing into the wood. They've got a solid, oily feel straight out of the package that makes them easy to drive even in tight spots. These will be my go-to for any new fixture builds.

The nylon pellet on these screws holds tight without galling the threads—perfect for the jig I’m building. They seated cleanly with a hex key and the black oxide finish looks professional.