براغي رأس كبس M42-4.5 X 340 مم | محرك سداسي | ملولبة جزئياً | سبيكة فولاذية فئة 12.9 مؤكسدة حرارياً سوداء

The black oxide finish on these M42 socket cap screws looks professional and seems durable. They threaded smoothly into my jig assembly without any binding. Exactly the heavy-duty hardware I needed for a tooling fixture.

The M42-4.5 x 340mm size is exactly as specified, and the hex socket drive seated my Allen key perfectly without any play. The partially threaded length gave me just the right grip for my jig assembly, and the thermal black oxide looks factory-fresh. These are solid, heavy-duty fasteners for the pri

The black oxide finish on these 12.9-grade bolts looks properly done, no flaking or uneven spots along the shank. Threads were clean and the partial threading made alignment in my jig setup a lot simpler than I expected.