3/8-16 × 4-1/2" براغي رأس مقبس | محرك سداسي | رقعة نايلون | خيط جزئي | فولاذ سبائكي مؤكسد أسود حراري (50/عبوة)

I needed some longer cap screws for a jig I'm building, and the 4-1/2" length is perfect for thick clamping setups. The hex socket drive made installation really easy, even in tight spots.

The nylon patch on these is a lifesaver—they hold snug even under vibration, and the black oxide finish looks sharp on my jig. Partial threading gave me just the grip length I needed for a tight tooling setup.

The thermal black oxide finish wiped clean easily and the nylon patch held firm during assembly on my jig setup. Threads cut smoothly into the steel plate without any binding, and the partially threaded length gave me just the right grip depth. These are exactly what I needed for tooling work.