31 is squeezed between the top wall portion 29 and the bottom wall portion 43 with a certain pressure such squeezing pressure provides a desirable resistive drag on the slide member 31 so that it moves with a more positive and exact movement in operation starting with the slide member 31 in its extended position the user rotates the hook member 36 against the force of the spring 35 on its hinge means until the hook member lip portion 40 grips the lip portion 17 of the keeper plate 10 the user rotates the turning means 45 one half turn 180 u00b0 clockwise as viewed looking down in fig2 the rivet 54 is rotated eccentrically clockwise about the imaginary center of the boss 39 and the three disks the shank of the rivet 54 cams within the transverse slot 55 to slide the slide member 31 within the guideway of the base member at the end of the one half turn the slide member 31 is completely withdrawn the operation is reversed to unlock the fastener the various members of the fastener are preferably stamped from sheet metal formed into their proper shapes and then plated and heat treated after they are shaped it will be noted that the various members may be completely formed plated and heat treated prior to assembly of the fastener modifications may be made in the above described embodiment within the scope of the invention and within the scope of the sub joined claims as shown in fig6 and 7 the fastener.