A steel nail with a mechanically deformed shank, often threaded helically, having a countersunk head and a blunt diamond point.
A steel nail with a mechanically deformed shank, often helically threaded, having a countersunk or casing head and a blunt diamond point.
The best-known brands are Primatech and Portanailer, which drive home the flooring nails into the base at the correct angle.
They're easier to keep quiet because you can renail them from the top with special flooring nails.