Butt chain

(Saddlery) a short chain attached to the end of a tug.

See also: Butt

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
None of the lumber I had on hand was wide enough for the largest pieces, but my uncle owns a band sawmill and he had all of the necessary lumber except one for the butt chain board.