Abstract: The modular fixture is in the form of a hollow chassis mounted on a base through which a chute extends for delivering parts for gauging. Gauging is provided by a plurality of modules fixed to reference surfaces of the chassis. A support module contains a mandrel mounted on a spindle for grasping and holding the parts during gauging. Gauge modules contain movable supports for sensors or feelers which gauge the parts. A movable stop and a movable fork associated with the chute cooperate to stop and support the part as it is being grasped by the mandrel. The modular nature of the fixture permits rearrangement of the modules such that parts of different types can be gauged.