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		                             National Stock Number: 5210-00-213-9060
  Federal Supply Class: 5210
  National Item Identification Number: 002139060
  Description: OPTICAL FLAT SET
  Detail: TWO OR MORE OPTICAL FLATS. EXCLUDES OPTICAL PARALLELS.
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  Manufacturer Information:
 | 049910-273 | 62679 | VAN KEUREN |  | 157-901 | 06WE4 | JAMES INDUSTRIAL INC |  | 25.20000 | 09058 | BNS HOLDING INC. DBA BNS CO DIV PRECISION MEASURING INSTRUMENTS TESA USA |  | 25.20000 | 0WCV0 | CAIL TOOL & MACHINERY, INC. |  | 157-901 | 0YN60 | MTI/MITUTOYO CORP |  | MIL026901CLASS2SET2 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |   
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  Techincal Specification:
 | NONDEFINITIVE SPEC/STD DATA | 2 CLASS AND 2 SET |  | SPECIAL FEATURES | (1) FUSED QUARTZ FLAT WK DOUBLE TYPE 0.000004 IN. FLATNESS ACCURACY 1.125 IN. DIA. EA 0.5 0.5063 0.5125 0.5188 IN. THK;W/CASE |   
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