The phrase "brass fittings" refers to small parts made of brass that are used to connect or attach pipes, tubes, or other objects together. Full definition
A matching pair of whimsical petite French 1950's boudoir lamps made of a Bakelite plexi type substance with brass fittings on a tripod stand. (1stdibs.com)
Through carved entrance doors with antique brass fittings, the magnificent views are immediately apparent. (luxuryretreats.com)