Abstract: An device for securing a fire arm has a base with a floor and two upstanding sidewalls, each sidewall defining a groove adjacent the floor. The device also has a first member pivotally mounted between the two sidewalls, a second member slidable in the grooves and adapted to couple with the first member to lock the fire arm between two protruded parts of the fire arm, a lock pin for locking the second member and a lock for locking the lock pin. The floor has at least one through-holes each for passage of a fastener, each through-hole being disposed under at least one of the first member and the second member, so that the fastener is inaccessible when the device is in use.

Abstract: A cantilevered washer for a male or female threaded fastener having a conical seat portion including an conically-shaped seat for receiving the threaded fastener in such maner as to load the washer at an angle and relieve hoop-stress on the threaded fastener. The washer further has an annular ring portion including a flat annular base for mating with a surface of a part being fastened. The annular ring portion and the conical seat portion are connected by a cantilever portion which is inclined at an angle of substantially 45.degree. to the flat bearing portion in order to provide a low profile vertical displacement between the conical seat portion and the flat bearing portion, as well as provide a location for deflection of variable bearing loads.