calibrator, surface roughness

calibrator, surface roughness

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Object Name
Calibrator, Surface Roughness
Calibration Standard
date made
place made
United States: New York
Physical Description
leather (case material)
overall - from catalog card: 3/16 in x 2 3/8 in x 3 5/8 in;.47625 cm x 6.0325 cm x 9.2075 cm
overall - calibrator: 3 5/8 in x 2 3/8 in x 1/8 in; 9.2075 cm x 6.0325 cm x.3175 cm
overall - case: 2 7/8 in x 4 1/2 in x 1/2 in; 7.3025 cm x 11.43 cm x 1.27 cm
ID Number
catalog number
accession number
Credit Line
Arthur F. Underwood
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Work and Industry: Mechanical and Civil Engineering
Data Source
National Museum of American History
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