براغي ضبط مقبس كوبية مع رقعة نايلون 5/16-24 × 1-1/4 بوصة | سبيكة فولاذ (100 / عبوة)

Used these to replace some worn set screws on a milling machine clamp, and the nylon patch definitely held firm against vibration. The cup point bit in nicely on the shaft without any slipping.

The hex socket drive lets me torque these into tight spots on my fixture without stripping. The nylon patch holds them in place perfectly during vibration, and the cup point bites nicely into the metal surface.

The hex socket drive makes these easy to torque down even in awkward spots, and the cup point bites into the shaft without any slipping. Used a full pack on a jig build and every one seated cleanly. The nylon patch holds tight enough that I didn't feel the need for threadlocker.