Nested Polygonal Member Locking Device

A nested polygonal member locking device comprising:

• an inner member, an outer perimeter shape of said inner member being polygonal defining a plurality of corners, said inner member being structured to have a groove extending into one of said corners;
• an outer member, a peripheral shape of said outer member being polygonal defining a plurality of outside corners, an interior shape of said outer member being polygonal and complementary to said outer perimeter shape of said inner member wherein said inner member is insertable into said outer member, said outer member being structured to have a slot extending through said outer member, said slot extending into one of said outer corners, said slot being alignable with said groove, each of said outer member and said inner member being square tubes;
• a collar having an annular interior face defining a circular channel, said outer member being insertable into said channel, said collar having a knurled outer surface;
• a flange coupled to said collar, said flange extending inwardly from said interior face into channel perpendicular to a central axis extending between opposite open ends of said channel, said flange being alignable with said slot and said groove, said collar being rotatable in a plane perpendicular to said inner and outer members such that said flange is positioned in said slot and said groove whereby said flange inhibits disengagement of said inner member from said outer member, a distal edge of said flange relative to said interior face of said collar being straight, said flange being coplanar with a bottom end of said collar;
• and
• said slot having a first end and a second end, said first end being positioned in a side of said outer polygonal member, said first end being straight and transverse to said side of said outer polygonal member, said second end of said slot being oblique relative to said side of said outer polygonal member.