| 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) | 01-081-5346 (010815346) |
| NCB Code | USA (01) |
| Manufacturer | Seiler Instrument And Manufacturing |
| MRC | Criteria | Characteristic |
|---|---|---|
| FEAT | SPECIAL FEATURES | MATL: RED GLASS,TYPE III,SPEC MIL-F-12717; ELEMENT IN ACCORD WITH SPEC MIL-O-13830; SURFACE QUALITY 80-50; MAX WEDGE NOT TO EXCEED 15 MINUTES (0.250 DEG); RIM AND CHAMFERS GROUND; NOT TO EXCEED 0.010 (FACE WIDTH); USED ON AIMING CIRCLE M2A2 |
| SR-5 | MANUFACTURERS CODE | 19200 |
| SR-5 | THE MANUFACTURERS DATA | |
| SR-5 | DESIGN CONTROL REFERENCE | 8211655 |
| MATL | MATERIAL | GLASS |
| ABMZ | DIAMETER | 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM |
| ABNM | THICKNESS | 0.030 INCHES MINIMUM AND 0.040 INCHES MAXIMUM |
| BMSG | POLISHED SURFACE | BOTH |
| BMSM | POLISHED PERIPHERY | PROVIDED |
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