Patent ID: 6371706
Filing Date: 2002-04-16
Classification: B25D,B26F,F16B

Abstract:
A hammer-in expansion fastener having an elongate body which has two opposite ends, said body having a longitudinal axis and a bore extending into it from one end to receive a screw, the other end of the body being tapered inwardly to a leading end of the body to an extent allowing the hammer-in expansion fastener to be driven into a wall of building material, said other end having a non-uniform taper of:(a) between 12Â° to 18Â° to the longitudinal axis of the body at the leading end and about 10 mm in length measured along the longitudinal axis; and (b) from 4Â° to 8Â° to the longitudinal axis of the body at a portion remote from the leading end.