براغي ضبط رأس كبس مخدد M4 × 16 مم | سبائك الصلب (500 / عبوة)

The hex socket drive on these let me really crank them down into a tight motor mount without slipping. For the price, getting a full 500 of alloy steel set screws with that knurled cup point is a steal. They've held fast through a few weeks of vibration with no loosening at all.

I was a little worried about stripping the hex socket drive under heavy torque, but these M4s handled it without a hitch. The knurled cup point dug in nicely and held position even in a tight corner where I couldn't get a wrench in.

The knurled cup point gripped perfectly on the shaft I was securing, and the hex socket drive made installation in that tight spot a breeze. Hard to beat this quality for the price per pack.