Grade AS-1, Manufactured under carefully controlled conditions allowing for the highest degree of accuracy when used at a temperature of 68 degrees F ( 20 degree C)
All gauge block sets are assigned serial numbers and are accompanied with a certificate of inspection listing the deviation for each block
All gauge block sets are made to special standards to resist corrosion and defacement
The coefficient of thermal expansion is 6.4 X 10
Each gage block set meets or exceeds federal specification ASME B89.1.9-2002
