NOT KNOWN FACTUAL STATEMENTS ABOUT TYPES OF SCREW HEADS CHART

A variation with the TA would be the tri-stage-3, which has rounded edges to overcome the TA’s a lot less- safe compatibility with hex drives. Measurements to the tri-angle push are in measurements preceded by a TA prefix.Flathead screwdrivers are generally used for screws having a straight slot to the head. They feature an individual, flat blade