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National Stock Number:
5220-00-782-1908
Federal Supply Class:
5220
National Item Identification Number:
007821908
Description:
LEVEL,PRECISION,MASTER
Detail:
A PRECISELY CALIBRATED INSTRUMENT USED AS A MASTER REFERENCE STANDARD TO ESTABLISH AN ABSOLUTE HORIZONTAL PLANE. THE METAL BASE IS SEASONED AND HEAT TREATED OR OTHERWISE SPECIALLY TREATED TO INSURE MAXIMUM STABILITY, AND IS ACCURATELY MACHINED AND SCRAPED TO THE TRUE PLANE ON THE CONTACT SURFACE. THE TOP PLATE IS OF NONCONDUCTIVE HEAT INSULATING MATERIAL. IT HAS A VERY SENSITIVE VIAL GRADUATED TO INDICATE A VARIATION OF 0.0005 INCH (0.0127 MM) PER FOOT (0.3048 M) IN A HORIZONTAL PLANE. IT MAY HAVE A CROSS LEVEL VIAL TO ASSIST IN SETTING THE TRUE HORIZONTAL BY SHOWING POSITION LATERALLY.
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Manufacturer Information:
| 142-56 | 64790 | TAYLOR HOBSON INC | | TB19 | 64790 | TAYLOR HOBSON INC |
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Techincal Specification:
| ADJUSTABILITY | ADJUSTABLE | | ADJUSTABLE CHARACTERISTICS | DEG OF PITCH | | DESIGN TYPE | SINGLE FACE | | OVERALL OUTSIDE DIMENSIONS | 5.000 IN. BY 1 IN. BASE | | MATERIAL | STEEL | | VIAL GRADUATION VALUE | ONE DIV OF GRADUATION EQUALS 0.29 THOUSANDTHS IN. PER FT | | VIAL QUANTITY | 1 LEVEL | | VIAL GRADUATIONS | INCLUDED LEVEL | | VIAL SURFACE FINISH | GROUND LEVEL | | VIAL TYPE | LEVEL |
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