Abstract: The button fastener comprises a fastener body and a cover member which is attached to the fastener body. The fastener body includes a disk-like base and a hollow, cylindrical post extending upward from a center area of the base concentrically. The post has a top opening at its upper end and a bottom opening in a center area of the base. The cover member covers the lower surface of the base including the bottom opening. The base includes a base bottom adjacent to the post and a base flange rising upward relative to the base bottom radially outward from the base bottom. The cover member includes a curved outer periphery curving from the lower surface side of the base and then rising upward beyond the base flange of the base.

Abstract: A hook-and-eye fastener comprises fastener members including a hook and an eye, each member having a pair of engaging prongs projecting substantially perpendicularly therefrom, and retainers adapted severally to immobilize the fastener members and intended to be disposed on the side of a fabric opposite to the side thereof on which the fastener members are set in place. Each of the retainers has a pair of thin-wall parts adapted to be pierced by the pair of engaging prongs of the relevant fastener member, and leading ends of the engaging prongs of each fastener member are formed in the shape of a flat part lying in a plane substantially perpendicular to a direction of penetration of the engaging prongs into the thin-wall parts of the relevant retainer.

Abstract: In a button which includes a button body and a tack member adapted to be joined with the button body when attaching the button to a garment fabric, the button body has a contractible and stretchable hollow hub in the form of a double tube composed of an outer tube integral with a button back and projecting downwardly therefrom and an inner tube separate from the button back and telescopically connected to the outer tube. A spring is mounted between the inner and outer tubes so as to normally urge the inner tube toward the button head.