The blocks in the 53-685-082 set feature high durability and rust resistant.
Fowler Tungsten Carbide Rectangular and Square Gage Block Sets are selected for stability,
durability and fine grain structure with a hardness of 70 RC. With this metal, a surface finish
of less than .2 millionths (.005 microns) is ensured and gives maximum wringability which is
appreciated by users of steel and chromium carbide gages.
The surface finish process removes all peaks, leaving a 100% surface resistant to wear, en-
suring long life within the original accuracy tolerance and retained wringability.
Edges of gaging faces are reinforced for a smooth radius.
Certificates of accuracy are furnished as standard with sets to the following grade: ASME
Tungsten carbide resists high corrosion, making it ideal for continuous handling. It is also slow
to react to "hot hands" with a low coefficient of expansion.
Inch surface finish .2 millionths; metric surface finish is .005 microns.