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National Stock Number:
5220-00-241-3609
Federal Supply Class:
5220
National Item Identification Number:
002413609
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:
| 199 | 57163 | L.S. STARRETT COMPANY (THE) | | 5210PL1274672 | 9009H | INSPEKTORAT WSPARCIA SIL ZBROJNYCH | | 7902552 | 19200 | US ARMY ARDEC RDECOM | | MILL15682TYPE4 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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Techincal Specification:
| ADJUSTABILITY | ADJUSTABLE | | ADJUSTABLE CHARACTERISTICS | TRUE VIALS | | DESIGN TYPE | SINGLE FACE | | OVERALL OUTSIDE DIMENSIONS | 15 IN. LG O/A | | MATERIAL | IRON CAST | | NONDEFINITIVE SPEC/STD DATA | 9 TYPE AND 1 CLASS | | VIAL ARRANGEMENT | SINGLE LEVEL | | VIAL GRADUATION VALUE | ONE DIV OF GRADUATION EQUALS 1/2 THOUSANDTH IN. PER FT | | VIAL QUANTITY | 1 LEVEL | | VIAL GRADUATIONS | NOT INCLUDED LEVEL | | VIAL SURFACE FINISH | GROUND LEVEL | | VIAL TYPE | LEVEL |
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