The Retainer,optical Element, cataloged under National Stock Number 5855-01-171-2817, 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 Lockheed Martin Corporation. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Retainer,optical Element |
| FSC / FSG | 5855 — Night Vision Equipment, Emitted and Reflected Radiation (FSG 58) |
| Manufacturers | Lockheed Martin Corporation (CAGE 04939) |
| Parameter | Value |
|---|---|
| NSN | 5855-01-171-2817 |
| Primary Part Number | 13074744 |
| Item Name | Retainer,optical Element |
| FSC / FSG | 5855 / 58 — Night Vision Equipment, Emitted and Reflected Radiation |
| Manufacturer | Lockheed Martin Corporation |
| Status | ACTIVE |
| Flange Diameter | 1.969 INCHES NOMINAL IN |
| Shoulder Length | 0.260 INCHES NOMINAL IN |
| Hole or Slot Quantity | 4 |
| Drive Type | SLOTTED |
| Shoulder Thread Size | 1.9375 IN.-32 IN |
| Style Designator | SHOULDERED |
| Setscrew Notch | NOT PROVIDED |
| Material Document and Classification | QQ-A-225/8, ALLOY 6061, T6 FED SPEC SINGLE MATERIAL RESPONSE |
| Surface Treatment | ANODIZE |
| Depth | 0.040 INCHES NOMINAL IN |
| Width | 0.040 INCHES NOMINAL IN |
| Internal Annular Serration | NOT PROVIDED |
| Material | ALUMINUM ALLOY 6061 |
| Hole Diameter | 1.720 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 | N |
| Part Number | Manufacturer |
|---|---|
| 13074744 PRIMARY | Lockheed Martin Corporation (USA) |
| Reference | Meaning |
|---|---|
| 13074744 | 5/9 Secondary reference Program Manager Advanced Attack Helicopter Barcom Amcpm-Aah |
NSN 5855-01-171-2817 is a Retainer,optical Element, manufactured by Lockheed Martin Corporation, classified under FSC 5855, Night Vision Equipment, Emitted and Reflected Radiation. Status: active.
NSN 5855-01-171-2817 has 1 manufacturer part number on file: 13074744 (Lockheed Martin Corporation).
Key specifications for 13074744: Flange Diameter: 1.969 INCHES NOMINAL IN; Shoulder Length: 0.260 INCHES NOMINAL IN; Hole or Slot Quantity: 4; Drive Type: SLOTTED. 14 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.