Rolled Thread Machine Screws
- Rolled thread machine screws are so called because they are thread-rolled during the manufacturing process. A rolled thread is more accurate and stronger than a machined or cut thread. We must not be confused between rolled thread machine screws, as opposed to thread rolling screws, which are threadforming screws.
- Machine screws are manufactured in medium carbon steel to strength grade 4.8 and also in other materials e.g. brass, stainless steel etc.
- Machine screws are fully threaded. The thread class of fit for rolled thread machine screws is 6g in the self-colour condition. A cautionary comment, with the class of thread fit at 6g, surface-coating thickness is important, particularly on small diameters where a build-up of plating on the threads may impede assembly into the mating hole or nut.
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