براغي رأس أسطواني M6-1 X 50mm | محرك سداسي داخلي | ملولبة جزئيًا | فئة 8.8 من سبائك الصلب مطلي بالزنك (400/عبوة)

The zinc plating looks uniform and clean, and the hex socket drive fit my Allen wrench perfectly without any stripping. I used these for a jig build and the partially threaded length gave me just the right grip for clamping down steel plates.

The partially threaded design made aligning these in a jig much easier than fully threaded bolts I've used before. Zinc plating looks consistent across all 400 pieces, with no flaking or rough edges right out of the box.

The hex socket drive seated perfectly on my Allen wrench, and the partial threading gave me just the grip I needed for a jig build. These held up great through a full day of assembly work, no stripped heads or bent shafts.