These are samples of metal countersunk screws manufactured by CNC lathe turning. A countersunk head screw is a construction part. The head is a 90-degree cone, similar to common wood screws. The head has tool tightening grooves, such as a zigzag, cross, inner hexagon, plum blossom, pentagon, etc. Countersunk head screws can be sunk under the surface to make the surface smooth, and hard objects need to drill countersunk holes at the corresponding positions of the countersunk head. In short, the countersunk head is the head of the screw that can keep the surface flat after installation.
Manufacturing screws with CNC technology is a very efficient production method, and it is very suitable for customized non-standard screws. The order quantity can be more or less, and the flexibility is high.