The Retainer,optical Element, cataloged under National Stock Number 5855-01-261-5495, is classified within Federal Supply Class 5855 (Night Vision Equipment, Emitted and Reflected Radiation) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Dept of the Army U S Army Electronics Command Night Vision Laboratory. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5855-01-261-5495 |
| Primary Part Number | 5005841 |
| Item Name | Retainer,optical Element |
| FSC / FSG | 5855 / 58 — Night Vision Equipment, Emitted and Reflected Radiation |
| Manufacturer | Dept of the Army U S Army Electronics Command Night Vision Laboratory |
| Status | ACTIVE |
| Flange Diameter | 1.875 INCHES NOMINAL IN |
| FSC Application Data | NIGHT VISION EQUIPMENT,EMITTED AND REFLECTED RADIATION |
| Shoulder Length | 0.598 INCHES NOMINAL IN |
| Shoulder Diameter | 1.329 INCHES NOMINAL IN |
| Style Designator | SHOULDERED |
| Setscrew Notch | NOT PROVIDED |
| Guide Design | THREAD RELIEF |
| Internal Annular Serration | PROVIDED |
| Material | ALUMINUM ALLOY |
| Hole Diameter | 1.222 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5005841 | Shiloh Industries Inc (USA) |
| 5005841 PRIMARY | Dept of the Army U S Army Electronics Command Night Vision Laboratory (USA) |
| Reference | Meaning |
|---|---|
| 5005841 | 5/9 Secondary reference Bell and Howell Phillipsburg Co Corporate Offices |
| 5005841 | 5/9 Secondary reference Elbit Systems of America - Night Vision Llc |
| 5005841.01 | 5/9 Secondary reference Whitcomb Corrine a |
NSN 5855-01-261-5495 is a Retainer,optical Element, manufactured by Dept of the Army U S Army Electronics Command Night Vision Laboratory, classified under FSC 5855, Night Vision Equipment, Emitted and Reflected Radiation. Status: active.
NSN 5855-01-261-5495 has 2 manufacturer part numbers on file: 5005841 (Shiloh Industries Inc), 5005841 (Dept of the Army U S Army Electronics Command Night Vision Laboratory).
1 possible match (shared part number, not a government interchangeability claim): 2805-01-539-2064. Verify interchangeability with system specifications before substitution.
Key specifications for 5005841: Flange Diameter: 1.875 INCHES NOMINAL IN; FSC Application Data: NIGHT VISION EQUIPMENT,EMITTED AND REFLECTED RADIATION; Shoulder Length: 0.598 INCHES NOMINAL IN; Shoulder Diameter: 1.329 INCHES NOMINAL IN. 10 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.