| 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) | 00-155-1366 (001551366) |
| NCB Code | USA (00) |
| Manufacturer | Bausch And Lomb Inc, Navair And Navsea Managed |
| MRC | Criteria | Characteristic |
|---|---|---|
| MATL | MATERIAL | GLASS, OPTICAL, JAN-G-174, GRADE C |
| ABMZ | DIAMETER | 24.0 MILLIMETERS NOMINAL |
| ABNM | THICKNESS | 3.1 MILLIMETERS NOMINAL |
| AJEF | BEVEL DEPTH | 0.7 MILLIMETERS NOMINAL |
| AGAV | III END ITEM IDENTIFICATION | RANGEFINDER MK57 |
| BMMX | REFRACTION INDEX | 1.5230 NOMINAL |
| BMSG | POLISHED SURFACE | BOTH |
| BMSM | POLISHED PERIPHERY | NOT PROVIDED |
| BMSP | BEVEL ANGLE IN DEG | 45.000 NOMINAL |
| Components Related to NSN - 1240-00-155-1366, 1240001551366 | ||||
| 1290-01-525-1366 (1290015251366) | 1240-00-171-4169 (1240001714169) | 1220-01-029-3593 (1220010293593) | 1270-00-854-5386 (1270008545386) | |
| 1220-00-142-6041 (1220001426041) | 1220-00-791-5656 (1220007915656) | 1270-00-917-1517 (1270009171517) | 1290-00-870-1440 (1290008701440) | |
| 1240-01-538-6884 (1240015386884) | 1270-00-093-4152 (1270000934152) | 1290-00-580-4441 (1290005804441) | 1220-00-152-3622 (1220001523622) | |
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