براغي رأس كبس M20-2.5 × 110 مم | محرك مقبس سداسي | ملولبة جزئيًا | فئة 8.8 من سبائك الصلب مؤكسد أسود حراريًا (25 / عبوة)

The hex socket drive made installation on my tooling jig much easier than using standard bolts. The partially threaded design grips perfectly in my precision assembly setup. These feel solid and well-made for the price.

I needed high-strength fasteners for a jig I was building, and these 8.8 alloy steel screws tightened perfectly with a hex key. The partially threaded design gave me just the right grip depth for my 20mm plate.

The black oxide finish is a nice touch for a shop that sees some moisture, and these screws seated cleanly in my jig plate without any binding. Threads were sharp and the 8.8 hardness feels solid for the tooling work I've put them through.