A surgical stapler (110) comprising； a handle assembly (112)； an elongated body part (114) extending distally from the handle assembly； and a head portion disposed adjacent to a distal portion of the elongated body part and including an anvil assembly and a cover assembly (120), one or more annular rows of staples placed in the cover assembly, the assembly being anvil movable in relation to the cover assembly between spaced and approximate positions, the anvil assembly having an anvil head (166) and a plurality of projections (171) having a tapered end (173) extending proximally to the head of anvil, with projections attachable with a part of the cover assembly, in which the cover assembly includes a plurality of openings (121), the openings being aligned with respective projections of the anvil assembly, in which the anvil assembly includes an anvil shaft extending proximally to the anvil head, the anvil shaft being detachably mounted on an anvil retainer of the stapler, in which they exit These extend substantially parallel to the anvil axis, and in which the projections are radially inwardly within one or more annular rows of staples.Una grapadora quirúrgica (110) que comprende； un conjunto de mango (112)； una parte de cuerpo alargada (114) que se extiende distalmente desde el conjunto de mango； y una porción de cabeza dispuesta adyacente a una parte distal de la parte de cuerpo alargada e incluyendo un conjunto de yunque y un conjunto de cubierta (120), una o más filas anulares de grapas colocadas en el conjunto de cubierta, siendo el conjunto de yunque desplazable en relación con el conjunto de cubierta entre posiciones espaciadas y aproximadas, teniendo el conjunto de yunque una cabeza de yunque (166) y una pluralidad de salientes (171) que tienen un extremo ahusado (173) que se extiende proximalmente a la cabeza de yunque, con salientes acoplables con una parte del conjunto de cubierta, en el que el conjunto de cubierta incluye una pluralidad de aberturas (12
