Part Details | OPTICAL FLAT
5210-00-882-6636 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.
Alternate Parts: AA58051, A-A-58051, GGO635, GG-O-635, AA58051 TY2CL2, A-A-58051 TY2CL2, 5210-00-882-6636, 00-882-6636, 5210008826636, 008826636
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 52 | NOV 17, 1967 | 00-882-6636 | 18274 ( OPTICAL FLAT ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 5210-00-882-6636
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| A-A-58051 | 58536 | FEDERAL COMMERCIAL ITEM DESCRIPTIONPROMULGATED BY GENERAL SERVICES |
| GG-O-635 | 81348 | FEDERAL SPECIFICATIONSPROMULGATED BY GENERAL SERVICES |
| A-A-58051 TY2CL2 | 80244 | GENERAL SERVICES ADMINISTRATIONFEDERAL SUPPLY SERVICE |
Technical Data | NSN 5210-00-882-6636
| Characteristic | Specifications |
|---|---|
| DESIGN TYPE | MASTER DOUBLE |
| WORKING SURFACE FLATNESS ACCURACY | 0.00000200 INCHES NOMINAL |
| DIAMETER | 5.000 INCHES NOMINAL |
| THICKNESS | 0.875 INCHES NOMINAL |
| CASE | PROVIDED |
| NONDEFINITIVE SPEC/STD DATA | 2 TYPE AND 2 CLASS |