The Retainer,optical Element, cataloged under National Stock Number 5855-00-010-5231, is classified within Federal Supply Class 5855 (Night Vision Equipment, Emitted and Reflected Radiation) of the Communication, Detection, and Coherent Radiation Equipment group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5855-00-010-5231 |
| Item Name | Retainer,optical Element |
| FSC / FSG | 5855 / 58 — Night Vision Equipment, Emitted and Reflected Radiation |
| Status | ACTIVE |
| FSC Application Data | NIGHT VISION EQUIP. |
| Drive Type | KNURL |
| Drive Facility Angular Spacing in Deg | 18.0 |
| Style Designator | RECESSED |
| Setscrew Notch | NOT PROVIDED |
| Diameter | 4.312 INCHES MINIMUM AND 4.344 INCHES MAXIMUM IN |
| Recess Depth | 1.567 INCHES NOMINAL IN |
| Recess Diameter | 3.952 INCHES NOMINAL IN |
| Guide Location | DRIVE EDGE |
| Thread Size | 3.875-32 |
| Guide Design | THREAD CHAMFER |
| Surface Treatment | ENAMEL AND ANODIZE |
| Depth | 0.222 INCHES NOMINAL IN |
| Width | 0.562 INCHES NOMINAL IN |
| Internal Annular Serration | NOT PROVIDED |
| Material | ALUMINUM ALLOY 6061 |
| Hole Diameter | 3.631 INCHES MINIMUM AND 3.633 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SC-D-5999156 | 5/9 Secondary reference Valcore Manufacturing Llc |
| SC-D-599156 | 3/2 Design control — primary reference U.S. Government activity |
| SC-D-599156 | 5/9 Secondary reference Valcore Manufacturing Llc Dba Use CAGE Code 04ye2 for Cataloging |
NSN 5855-00-010-5231 is a Retainer,optical Element, classified under FSC 5855, Night Vision Equipment, Emitted and Reflected Radiation. Status: active.
Key specifications for 5855-00-010-5231: FSC Application Data: NIGHT VISION EQUIP.; Drive Type: KNURL; Drive Facility Angular Spacing in Deg: 18.0; Style Designator: RECESSED. 17 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.