Star Drive Pan Head Machine Screws feature a Pan Head and a Torx Style 6 Lobe Drive. Star drive machine screws are often used with a nut or driven into tapped holes. These screws tend to be found in smaller sizes and holding machinery together but can serve other purposes as well.
Star Drive Screws are designed so the driver will not slip out of the fastener the way a Phillips drive may, since the driver is not inherently centered on the fastener. A benefit/disadvantage of the non-typical torx style drive (depending on your point of view) is that it can be more difficult for users of a device to disassemble it than if more-common drive styles were used. As stated, the 6 Lobe drive reduces the chance of fastener stripping, allowing for a higher torque installation.
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