049910-273
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A flat, transparent piece of glass, generally of fused quartz, with one or both principal surfaces polished to within a few millionths of an inch of a true plane. It is used in conjunction with a monochromatic light source to measure the flatness of precision finished surfaces, and to determine the distance and parallelism between precision finished surfaces by comparison with known standards. In operation the flat is superimposed, reference surface downward, on the parts under test and when illuminated by monochromatic light the rays reflected from the reference surface are either reinforced or neutralized by the rays reflected from the surface under test producing interference bands which reveal any variations in the thickness of the film of air between surface under test and the flat. Excludes:optical parallels.
(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 special features, 2 class and 2 set nondefinitive spec/std data
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- 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
- Nondefinitive Spec/Std Data
- 2 class and 2 set
Related Parts
This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:
| Part Number | Name |
|---|---|
| 049910-273 | Optical Flat Set |
| 157-901 | Optical Flat Set |
| 25.20000 | Optical Flat Set |
| MIL026901CLASS2SET2 | Optical Flat Set |
FAQs
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Does NSN 5210-00-213-9060 contain hazardous materials?
When the NSN 5210-00-213-9060 was assigned to the Federal Catalog?
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