Exodus 27:10

and its pillars shall be twenty, with their twenty sockets of bronze; the hooks of the pillars and their bands shall be of silver.

Exodus 26:19-21

You shall make forty sockets of silver under the twenty boards, two sockets under one board for its two tenons and two sockets under another board for its two tenons;

Exodus 36:38

and he made its five pillars with their hooks, and he overlaid their tops and their bands with gold; but their five sockets were of bronze.

Jeremiah 52:21

As for the pillars, the height of each pillar was eighteen cubits, and it was twelve cubits in circumference and four fingers in thickness, and hollow.

Treasury of Scripture Knowledge

Summary

And the twenty pillars thereof and their twenty sockets shall be of brass; the hooks of the pillars and their fillets shall be of silver.

Sockets shall be of brass

Fillets shall be of silver

Bible References

Sockets shall be of brass

Exodus 26:19
You shall make forty sockets of silver under the twenty boards, two sockets under one board for its two tenons and two sockets under another board for its two tenons;

Fillets shall be of silver

Exodus 36:38
and he made its five pillars with their hooks, and he overlaid their tops and their bands with gold; but their five sockets were of bronze.
Jeremiah 52:21
As for the pillars, the height of each pillar was eighteen cubits, and it was twelve cubits in circumference and four fingers in thickness, and hollow.