Comparators for determining surface roughness by touch and sight. Conforms to ASTM D4417. The KTA standard has 5 different grades of roughness and is available in three different versions. Available in Imperial units only.
Rugotest no. 3 comparison standard for blasted surfaces consisting of 6 examples of grit-blasting and 6 examples of shot-blasting. The method complies with ASTM D 4417/A. Supplied with a case.
Comparison standard according to ISO 8503 part 1 made of quality steel. Indicates the surface condition of blasted steel according to ISO 8503 in grades of fine, medium, and coarse.