Friction weld plug

A method for installing a friction weld plug, the method comprising:

• bonding, via a friction stir welding process, a first panel to a second panel, thereby forming a wall and producing a hole in the wall;
• inserting, from a first side of the wall, a fastener of the friction weld plug through a spacer of the friction weld plug and into the hole in the wall;
• inserting, from a second side of the wall that is opposite the first side, a nose of a stud of the friction weld plug into the hole;
• and
• creating, via rotating male threads of the fastener against female threads of a cavity within the nose, an attachment that presses the spacer against the first side of the wall and presses a gasket against the second side of the wall, thereby forming a seal between the gasket contained in a groove in a shoulder of the stud and the second side of the wall.

A friction weld plug comprising:

• a first spring seal;
• a second spring seal;
• a stud comprising:
• a nose configured to be inserted into a first hole formed within a wall, wherein the nose comprises a cavity having female threads;
• and
• a shoulder extending radially from the nose and comprising a first groove configured to contain the first spring seal and a second groove configured to contain the second spring seal;
• a spacer comprising a second hole;
• and
• a fastener comprising male threads, wherein the fastener is configured to be inserted through the second hole, into the first hole, and into the cavity such that the male threads and the female threads form an attachment that presses the spacer against a first side of the wall and presses the first spring seal and the second spring seal against a second side of the wall that is opposite the first side, thereby forming a first seal between the first spring seal and the second side of the wall and a second seal between the second spring seal and the second side of the wall.