HOLO-KROME 72382 براغي رأس مقبس مقاس 1-8 × 4" | محرك مقبس سداسي | فولاذ سبائكي مؤكسد أسود حراريًا (10/عبوة)

Threads are clean and the 1-8 pitch grabbed perfectly in my jig fixture—no wobble or cross-threading. For 4-inch alloy steel with that oxide coating, they’re solidly built and the socket drive holds up to a cheater bar without stripping.

The black oxide finish on these screws is holding up well in my jig setup, no rust after a week of use. Fit perfectly into the pre-tapped holes on my fixture plate. Nice to have a full pack of ten for a fair price.

I was replacing the cap screws on my milling fixture and these went in with zero binding—the threads are cut clean and the hex socket drive seated perfectly on my Allen wrench. The 4" length was exactly what I needed for this jig setup, and the thermal black oxide gave them a consistent, matte look