براغي رأس أسطوانية M4-0.7 × 55 مم | محرك سداسي | ملولبة جزئيًا | فئة 12.9 فولاذ سبائكي مطلي بالزنك (200 / عبوة)

I needed longer M4 bolts for a jig I was building, and these 55mm screws were exactly what I was looking for. The hex socket drive made installation quick with a simple hex key, and the zinc plating seems nicely finished.

The partially threaded design made them perfect for my jig build where I needed a clean shoulder. These screws grip tightly with the hex drive and the zinc plating gives a nice uniform finish. Exactly the right length for what I was doing.

Needed a set of long M4 bolts for a jig I’m building, and the 55mm length with partial threading is perfect for clamping thicker plates. The zinc plating looks clean and consistent across all 200 pieces, so no rust worries down the line.