Patent ID: 8381934

Claim:
A non-breakstem sealing plug for blind installation in a suitable hole thereby to plug and seal the hole, which sealing plug comprises: a sleeve, a nut stem retained in the sleeve by an interference fit, wherein the nut stem has: a shoulder configured to axially abut an end portion of the sleeve, a head at least part of which is radially enlarged with respect to a remainder of the stem, and a hollow core extending from an open end of the nut stem opposite the head through at least a portion of the remainder of the nut stem, wherein the hollow core is internally threaded, and wherein the nut stem comprises a material which is harder than that of the sleeve; wherein the sealing plug is insertable in a suitable hole, with the sleeve entirely within the hole, and the sleeve is expandable by axial compression applied by the shoulder to the sleeve material abutting it, thereby causing the sleeve to deform and expand radially outwardly to engage with a wall of the hole.