A surgical apparatus, comprising: (a) a shaft, wherein the shaft has a distal end; (b) an end effector (100; 200; 300), wherein the end effector is disposed at the distal end of the shaft, wherein the end effector defines a gap configured to receive tissue, wherein the end effector comprises: (i) a first fastener assembly forming feature (140; 240; 340) positioned at a first side of the gap, and (ii) a second fastener assembly forming feature (120; 225; 325) positioned at a second side of the gap; (c) a first fastener assembly member (160; 260; 360), wherein the first fastener assembly forming feature (140; 240; 340) is configured to receive the first fastener assembly member (160; 260; 360) and position the first fastener assembly member (160; 260; 360) at the first side of the gap; and (d) a second fastener assembly member (170; 270; 370), wherein the second fastener assembly forming feature (120; 225;325) is configured to receive the second fastener assembly member (170; 270; 370) and position the second fastener assembly member (170; 270; 370) at the second side of the gap, wherein, (e) the first fastener assembly forming feature (140; 240; 340) is rotatable relative to the shaft; characterized in that: (f) the first and second fastener assembly members (160, 170; 260, 270; 360, 370) are configured to be translated distally through the shaft by rotation of the first fastener assembly forming feature (140; 240; 340); and (g) the first and second fastener assembly members (160, 170; 260, 270; 360, 370) are configured to join together and thereby form a fastener assembly. (a) a shaft, wherein the shaft has a distal end; (b) an end effector (100; 200; 300), wherein the end effector is disposed at the distal end of the shaft, wherein the end effector defines a gap configured to receive tissue, wherein the end effector comprises: (i) a first fastener assembly forming feature (140; 240; 340) positioned at a first side of the gap, and (ii) a second fastener assembly forming feature (120; 225; 325) positioned at a second side of the gap; (i) a first fastener assembly forming feature (140; 240; 340) positioned at a first side of the gap, and (ii) a second fastener assembly forming feature (120; 225; 325) positioned at a second side of the gap; (c) a first fastener assembly member (160; 260; 360), wherein the first fastener assembly forming feature (140; 240; 340) is configured to receive the first fastener assembly member (160; 260; 360) and position the first fastener assembly member (160; 260; 360) at the first side of the gap; and (d) a second fastener assembly member (170; 270; 370), wherein the second fastener assembly forming feature (120; 225;325) is configured to receive the second fastener assembly member (170; 270; 370) and position the second fastener assembly member (170; 270; 370) at the second side of the gap, wherein, (e) the first fastener assembly forming feature (140; 240; 340) is rotatable relative to the shaft; (f) the first and second fastener assembly members (160, 170; 260, 270; 360, 370) are configured to be translated distally through the shaft by rotation of the first fastener assembly forming feature (140; 240; 340); and (g) the first and second fastener assembly members (160, 170; 260, 270; 360, 370) are configured to join together and thereby form a fastener assembly.