براغي قبعة مقبس 7/16-14 X 3 بوصة | محرك مقبس سداسي | حبيبة نايلون | ملولبة جزئيًا | فولاذ سبائكي مع أكسيد أسود حراري (50 / عبوة)

The black oxide finish gives these a nice, uniform look and seems tough enough for the shop floor. I've used a dozen already for jigs, and the nylon pellet does its job holding the threads snug without galling.

The partially threaded design made seating these in a jig a breeze, and the nylon pellet locks them down tight under vibration. I’ve torqued them repeatedly and the hex socket hasn’t stripped once. Fifty pieces for this price is a solid deal.

The black oxide finish is holding up well on these caps, no rust after a few days in a damp shop. They threaded clean into some jig fixtures I’m working on, and the partial threading gave me just the grip I needed.