Fitting

approprié

(appropriate, suitable — see also appropriate, suitable, adequate, apt, convenient, favorable, opportune)

conforme

(appropriate, suitable — see also appropriate, suitable, adequate, apt, convenient, favorable, opportune)

convenable

(appropriate, suitable — see also appropriate, suitable, adequate, apt, convenient, favorable, opportune)

coupleur

(standardized part of a piping system used to connect sections of pipe together)

essayage

(act of trying on an item of clothing to adjust or inspect how well it fits)