BS 957:2008 pdf free.Specification for feeler gauges.The introduction of BS 957: BS 957 specifies requirements for feeler gauges, comprising a series of gauging blades (blades) of graded thicknesses assembled in a protective sheath or supplied individually. These include requirements for dimensions which are expressed in metric and inch units. This standard is applicable to blades of thicknesses: • from 0.03...