| Item Name | Ring Retaining Opti |
| Federal Supply Group (FSG) | Fire Control Equipment |
| Federal Supply Class (FSC) | 1240 Optical Sighting And Ranging Equipment |
| National Item Identification Number (NIIN) | 01-171-8377 (011718377) |
| NCB Code | USA (01) |
| Manufacturer | Program Manager Advanced Attack |
| MRC | Criteria | Characteristic |
|---|---|---|
| AJYP | SCREW THREAD SERIES DESIGNATOR | UNS |
| AAJD | THREAD CLASS | 2B |
| AAJE | THREAD PITCH DIAMETERS | 4.7297 TO 4.7358 INCHES |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AAVZ | GROOVE DIAMETER | 4.820 INCHES NOMINAL |
| ABET | THREAD LENGTH | 0.680 INCHES |
| APJC | THREAD LOCATION | INTERNAL |
| ABHP | OVERALL LENGTH | 1.250 INCHES NOMINAL |
| ABKV | OUTSIDE DIAMETER | 5.020 INCHES NOMINAL |
| ABUJ | THREAD SIZE | 4 3/4-32 |
| MATL | MATERIAL | ALUMINUM ALLOY |
| ADWA | INNER GROOVE WIDTH | 0.050 INCHES NOMINAL |
| BMTL | INTERNAL FLANGE THICKNESS | 0.543 INCHES NOMINAL |
| BMTY | GROOVE LOCATION | INSIDE END OF THREAD |
| SURF | SURFACE TREATMENT | ANODIZED, MIL-A-8625 |
| Relevant Components for NSN - 1240-01-171-8377, 1240011718377 | ||||
| 1265-00-614-8088 (1265006148088) | 1240-01-118-9964 (1240011189964) | 1285-00-449-6275 (1285004496275) | 1270-01-119-6523 (1270011196523) | |
| 1290-01-330-1595 (1290013301595) | 1270-00-313-9175 (1270003139175) | 1280-00-868-4875 (1280008684875) | 1290-01-546-6194 (1290015466194) | |
| 1290-01-416-9390 (1290014169390) | 1290-01-069-3391 (1290010693391) | 1270-00-019-7649 (1270000197649) | 1270-00-023-3389 (1270000233389) | |
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