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Application filed by shi-zhong HuangfiledCriticalshi-zhong Huang
Priority to TW093134922ApriorityCriticalpatent/TW200615467A/en
Publication of TW200615467ApublicationCriticalpatent/TW200615467A/en
This invention relates to a structure of nail. The nail is made of metal material such as iron or steel. The nail has a sharp-pointed end and head part on the other end. Moreover, there is a threaded portion on the nail body at appropriate position; and the head part is equipped with a driving part such as notch or slot so that the nail can be pulled out easily by using screwdriver.
Press nut for use with metal sheet has central bore with thread at top, bore extending into shaft with deformable section at its lower end which is pressed into wall of bore in sheet when bolt is inserted