FASTENER FOR USE IN AN EXPLOSIVE-POWERED FASTENER-DRIVING TOOL

摘要

A fastening member for use in a setting tool operated by an explosive powder charge, consists of a nail having a cylindrically-shaped axially extending shank with two washers positioned in spaced relation on the shank. A frusto-conically-shaped portion of the nail extends and widens in the axial direction from the trailing end of the shank. At least one of the washers is dish-shaped with its hollow surface facing toward the tip or leading end of the nail. The shank of the nail can be knurled, preferably in a herringbone pattern. The trailing end of the frusto-conically-shaped portion terminates in a cylindrically-shaped portion which may project radially outwardly from the frusto-conical portion forming a nail head.