Patent ID: 6321625
Filing Date: 2001-11-27
Classification: B25B,F16B

Abstract:
The combination of:a fastener comprising;a. a right circular hollow cylinder having predetermined diametrical and length dimensions,b. a threaded interior,c. a plurality of longitudinally extending, semi-circularly shaped projections located at equally spaced intervals around its external circumference and having predetermined dimensions, andd. a flange located at one end of the cylinder and extending radially outwardly therefrom to a predetermined diameter, anda tool for the fastener comprising:a. a cylindrical body having a front end and a rear end, the front end comprising a flange engaging surface, the cylindrical body having an outside diameter substantially equal to the diameter of the flange;b. a right circular cylindrical aperture formed in the front end of the cylindrical body and having diametrical and depth dimensions which are substantially identical to the diametrical and length dimensions of the cylindrical body of the fastener and having a plurality of longitudinally extending, semi-circularly shaped grooves formed therein having dimensions which are substantially identical to the corresponding dimensions of the longitudinally extending, semi-circularly shaped projections on the body of the fastener;c. whereby the cylindrical body and the projections thereon of the fastener are snugly received in the cylindrical cavity comprising the front end of the tool to prevent slippage therebetween during engagement and disengagement of the fastener; andd. a drive lug secured to and extending from the rear end of the cylindrical body of the tool and having a hexagonal exterior surface for engagement by a conventional wrench and having a square aperture extending therethrough for engagement by a square drive lug.