tackle-block

This is a variation of the figure-eight knot, already described, and is used where there is too much rope, or where a simple knot is desired to prevent the rope running through an eye, ring, or tackle-block.

Knots, Splices and Rope Work A Practical Treatise 1912

Taking a small boat-mast, the boatswain rapidly lashed the ends of the temporary hammock fast to the spar, and then ropes were carried and secured to the tackle-block in a way that, when all was ready, there was no difficulty in hauling the spar horizontally up, with the temporary hammock and its burden swinging from the spar like a palanquin.

Syd Belton The Boy who would not go to Sea George Manville Fenn 1870

Turk's-head clew, and black as a tarred tackle-block, could be nothing else than the woolly pate of Snowball, the sea-cook!

The Ocean Waifs A Story of Adventure on Land and Sea Mayne Reid 1850