براغي رأس كبس M36-4 × 190mm | محرك سداسي | خيط جزئي | فولاذ سبائكي فئة 12.9 مع أكسيد أسود حراري

These are absolute beasts for heavy jig work, the hex socket drive made torquing them into my fixture plates effortless. The 12.9 alloy steel took the load without a hint of flex, and the black oxide finish looks clean against the machined surfaces.

The partially threaded length gave me just the grip I needed for a jig assembly—no fiddling with spacers. Class 12.9 alloy steel feels seriously solid for the precision work I’m doing. These are going straight into my go-to bin.

The black oxide finish on these M36-4s looks even better in person than in the photos, and the hex socket drive seated perfectly on my wrench for a tight fit. Threading them into the jig frame took a solid effort, but that’s exactly what I wanted from a class 12.9 fastener — they feel rock solid now