Fastener for expandable barrier

A method of forming a connection between two articles comprising:

• (A) providing a female pin comprising
• (i) a first annular wall comprising a first end and a second end;
• (ii) at least one female arm extending from the first end of the first annular wall, each female arm comprising a proximal end, a distal end, a female arm outer surface, and a female projection at the distal end that extends from the female arm outer surface;
• and
• (iii) a first ledge positioned at the second end of the first annular wall;
• (B) providing a male pin comprising
• (i) a second annular wall comprising a first end, a second end, and an outer diameter, the second annular wall having a second annular wall length (LMAW);
• (ii) at least two male arms extending from the first end of the second annular wall, the male arms each comprising a proximal end, a distal end, and a male arm outer surface, and at least one of the male arms comprising a male projection at the distal end that extends from the male arm outer surface, the at least two male arms having a male arm length (LMA), wherein a LMAW:LMA ratio is from 1:1 to 1:2, and wherein at least one of the at least two male arms is void of a male projection;
• and
• (iii) an annular projection at the second end of the second annular wall, the annular projection having an outer annular diameter that is greater than the outer diameter of the second annular wall;
• (C) providing a first article comprising a first wall and a first opening extending through the first wall;
• (D) providing a second article comprising a second wall and a second opening extending through the second wall, the second wall comprising a second ledge;
• (E) aligning the first opening with the second opening;
• (F) inserting the female pin through the first opening and the second opening, such that the female projection contacts the second ledge;
• and
• (G) inserting the male pin through the first annular wall of the female pin, such that the male pin extends through the second opening and the first opening, and the male projection contacts the first ledge, thereby forming a connection between the first article and the second article.