براغي ذات رأس أسطواني مجوف M16-2 × 240 مم | رأس مسطح بمحرك سداسي داخلي | ملولبة جزئيًا | فئة 12.9 من سبائك الفولاذ مطلي بالزنك (10/عبوة)

The 240mm length is exactly what I needed for a custom jig setup, and the zinc plating looks clean and durable. Threads cut smoothly into tapped holes without any binding or galling.

Third set of these I've ordered for my jigs and fixtures, and the 12.9 alloy steel holds up way better than the cheaper 8.8s I used to burn through. The partial threading makes alignment in blind holes a lot less fiddly, and the zinc finish still looks clean after months of shop grime.

The hex socket drive grabbed my 6mm allen key perfectly without any slippage during assembly. For a jig I'm building, the partially threaded design gives just the right amount of grip versus clearance. Zinc coating looks clean and should resist rust in my shop.