This part of BS 2634 specifies the characteristics of roughness
comparison specimens of turned, ground, bored, milled, shaped and
planed surfaces. These are intended for tactile and visual comparison
with workpiece surfaces of similar lay that have been produced by
similar machining methods.
BS 2634-1:2010 history
2010BS 2634-1:2010 Roughness comparison specimens. Part 1: Specification for turned, ground, bored, milled, shaped and planed specimens
1987BS 2634-1:1987 Roughness comparison specimens. Specification for turned, ground, bored, milled, shaped and planed specimens