Fillets were rods or joining pieces that connected the tops of the pillars surrounding the Tabernacle court. The curtains were suspended from these joined structures. The same English word also translates a thread or measuring line used around Temple pillars.
Fillets belonged to the construction and furnishings of the Tabernacle court. A related term described the measuring line used for the circumference of Solomon’s copper pillars.
The Temple measuring line was twelve cubits long for measuring the circumference of the copper pillars.