براغي رأس سداسي M4-0.7×45mm | محرك سداسي | ملولبة جزئياً | فولاذ سبائكي فئة 8.8 مطلي بالزنك (400/عبوة)

I was worried about the hex socket stripping, but these 12.9-grade screws held up perfectly when I tightened them into a steel jig. The zinc plating gives them a clean, consistent look.

The partial threading on these M4 screws made all the difference for my jig assembly—they seated perfectly without any binding. The hex socket drive grabs nicely with a standard Allen key, and the zinc coating looks clean and durable out of the bag.

The hex socket drive bites perfectly, no stripping even when I cranked them tight into my jig. Zinc plating looks uniform across all 400, and the partial threading gave just the right grip for my assembly.