초록 ▼

A double ended stud fastening assembly with coaxially disposed stud shanks separated by an outwardly projecting rigid flange. The first shank includes a helical thread formed thereon in one direction and the second stud shank includes a helical thread formed thereon in a direction opposite the direc

A double ended stud fastening assembly with coaxially disposed stud shanks separated by an outwardly projecting rigid flange. The first shank includes a helical thread formed thereon in one direction and the second stud shank includes a helical thread formed thereon in a direction opposite the direction of the thread on the first shank. The surfaces of the rigid flange adjacent the first and second shank are substantially planar with the flange body extending perpendicular to the axis of the shanks so that when the second stud shank is mounted in a workpiece a subsequent attachment member placed over the first stud shank will be held in place by a nut.

대표청구항 ▼

A workpiece fastening assembly for fastening an attachment member to a plastic workpiece comprising in combination a stud member including upper and lower shank portions and an outwardly extending flange intermediate said shank portions, said flange having substantially planar upper and lower surfac

A workpiece fastening assembly for fastening an attachment member to a plastic workpiece comprising in combination a stud member including upper and lower shank portions and an outwardly extending flange intermediate said shank portions, said flange having substantially planar upper and lower surfaces, said upper shank portion being threaded in one direction and said lower shank portion being threaded in the opposite direction from the upper shank portion, said lower shank portion being threaded in a plastic workpiece until the lower surface of the flange abuts the plastic workpiece, an attachment member mounted on the upper surface of said flange, said attachment member defining an aperture therein through which said upper shank portion protrudes and nut means threadably mounted on said upper shank, said nut means being rotated on said upper shank until the lower surface of said nut means engages said attachment member to hold said attachment member against said flange, the initial back off torque of said nut means when rotated to remove it from said upper shank after engaging said attachment tightening said lower shank in said plastic workpiece.