Technical Data:
Series: 516
Product type: Rectangular Gage Block with Thermal Expansion Coefficient Data
Material: Steel
Nominal length: 8 in
Grade: K class in ASME
Thermal expansion coefficient: Individually measured by high-accuracy double-faced interferometer
Uncertainty of thermal expansion coefficient: 0.035 x 10^-6/K (k=2)
Uncertainty of dimension measurement: 30 nm (k=2) for 100 mm block
Certificate: Inspection Certificate

Dimensions:
Rectangular measuring-face width=1.378 in, tolerance +0 / -0.012 in
Measuring-face depth=0.354 in, tolerance -0.002 / -0.008 in
Long-block construction: 2 x Dia.10 holes
Airy-line reference=0.211 x nominal length from each end
End reference dimension=0.984 +/-0.02 in at both ends
Nominal length is between the lapped measuring faces.