headstall

päitset, niskahihna The part of a bridle that fits over a horse's head and supports other elements. (defdate)
1596, (w), The Faerie Queene, V.3:

Another, that would seeme to have more wit, / Him by the bright embrodered hed-stall tooke ….

Then the smith Ilmarinen / the everlasting craftsman / out of steel formed a bridle / forged a headstall (transterm) of iron ….