| 摘要 |
A fastening element to be driven into a hard receiving material, such as metal, includes a head at its trailing end and an axially extending shank projecting from the head to the leading end with a tip at the leading end. At least an axially extending section of the shank from adjacent the trailing end is threaded. A guide member is in threaded engagement with the shank and is spaced from the head when the fastening element is ready to be driven. The guide member is cup-like shaped with an opening facing toward the leading end. The guide member has a base extending transversely of the axial direction with a conically shaped section projecting radially outwardly from the base and axially toward the leading end. When the fastening element is driven into a receiving material, the guide member moves into contact with the head and is deformed when the driving of the fastening element is braked. |
