Loop

LOOP (לֻֽלָאֹ֗ת). The Tabernacle was covered with ten linen curtains, each measuring twenty-eight cubits by four. These were sewn along their length into two sets of five, which were draped over the frame of the Tabernacle structure. Along one side of each set of curtains fifty loops of blue thread were sewn. Fifty gold clasps were attached to one side of the other set of curtains, and thus the two halves of the curtain were joined. The outer covering was made of goatskin in the same way, also with clasps and loops.

International Standard Bible Encyclopedia (1915)

(in plural lula’oth (Ex 26:4 f,10 f; 36:11 f,17)): A ring or fold made of blue thread to fasten into the corresponding golden clasps, or taches upon the curtains of the tabernacle, joining them in sets, or pairs.

See Tabernacle.