The thickness of sheet or the diameter of wire. The various standards are arbitrary and differ with regard to ferrous and non-ferrous products as well as sheet and wire. An aid for visual inspection that enables an inspector to determine more reliably whether the size or contour of a formed part meets dimensional requirements. The ability of a material to under go plastic deformation without fracture. A device used to position work in a die accurately. Another name for a checking fixture which is used to check parts. See gauge.