براغي رأس مقبس 3/8-24 × 5/8 بوصة | محرك مقبس سداسي | حبيبات نايلون | كامل الخيوط | فولاذ سبائك أسود حراري (100/عبوة)

The threaded nylon pellet locks tight without any loosening under vibration, which is exactly what I needed for a precision assembly. The black oxide finish also makes them easy to grip during installation, and all 100 arrived with clean threads.

The nylon pellet locking feature on these screws is exactly what I needed for securing adjustments on a jig without vibrating loose. They thread smoothly into 3/8-24 tapped holes and the black oxide finish looks clean and professional. A solid choice for precision work.

Installed a batch of these in a new jig I'm building and the black oxide finish held up nicely against some moderate torque. The hex socket drive seated well with my Allen key, no stripping issues. Only minor thing is the nylon pellet gives decent lock but not as strong as a separate threadlocker.