براغي مقبس M16-2 × 280 مم | محرك سداسي | خيط جزئي | فولاذ سبائك فئة 12.9 مؤكسد أسود حراريًا (10 قطع/عبوة)

The threading on these screws is precise and clean, which made assembly into my tooling fixture smooth without any binding. The black oxide finish gives them a nice, durable look for industrial use too.

I needed these for a jig I was building and the 280mm length was just right for a deep reach into the assembly. The black oxide finish held up well against some minor handling, though I wish the package had a few more screws for the price.

The partially threaded design made installation into my test fixture a breeze. These bolts fit snugly in the hex socket and the black oxide finish looks clean. Only reason for 4 stars is that the 280mm length is a bit long for some of my smaller jigs.