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| Item Name | Window Optical Inst |
| Federal Supply Group (FSG) | Fire Control Equipment |
| Federal Supply Class (FSC) | 1240 Optical Sighting And Ranging Equipment |
| National Item Identification Number (NIIN) | 00-171-4178 (001714178) |
| NCB Code | USA (00) |
| Manufacturer | Optical Technology Devices Inc, Navair And Navsea Managed |
| MRC | Criteria | Characteristic |
|---|---|---|
| MRC | Decoded Requirement | Clear Text Reply |
| AJEF | Bevel Depth | 0.750 MILLIMETERS NOMINAL |
| ZZZV | Fsc Application Data | TELESCOPE MK 102 MOD 3 |
| BMSP | Bevel Angle In Deg | 45.000 NOMINAL |
| BMSG | Polished Surface | BOTH |
| BMSM | Polished Periphery | NOT PROVIDED |
| BMSH | Dispersion | 64.5 ANGSTROMS NOMINAL |
| BMSK | Reflection Reducing Surface | BOTH |
| MATT | Material | GLASS, OPTICAL, JAN-G-174, TYPE 517-645, GRADE B |
| ABNM | Thickness | 5.800 MILLIMETERS MINIMUM AND 6.200 MILLIMETERS MAXIMUM |
| ABMZ | Diameter | 50.950 MILLIMETERS MINIMUM AND 51.000 MILLIMETERS MAXIMUM |
| BMMX | Refraction Index | 1.5170 NOMINAL |
| Relevant Components for NSN - 1240-00-171-4178, 1240001714178 | ||||
| 1240-01-613-5730 (1240016135730) | 1285-00-412-8060 (1285004128060) | 1260-00-898-4681 (1260008984681) | 1290-00-346-8168 (1290003468168) | |
| 1220-00-381-8911 (1220003818911) | 1285-00-220-2647 (1285002202647) | 1210-00-381-5307 (1210003815307) | 1265-00-152-7947 (1265001527947) | |
| 1290-01-372-5262 (1290013725262) | 1240-00-130-9547 (1240001309547) | 1270-00-606-7309 (1270006067309) | 1240-01-204-7772 (1240012047772) | |
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