The Cap,lens, cataloged under National Stock Number 5855-01-371-5645, 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 Northrop Grumman Systems Corporation. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5855-01-371-5645 |
| Primary Part Number | A3187172 |
| Item Name | Cap,lens |
| FSC / FSG | 5855 / 58 — Night Vision Equipment, Emitted and Reflected Radiation |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Overall Diameter | 2.050 INCHES NOMINAL IN |
| Overall Thickness | 1.930 INCHES NOMINAL IN |
| Material | PLASTIC |
| Mounting Provision | SCREW |
| 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 |
|---|---|
| A3187172 | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A3187172 | 5/9 Secondary reference L3 Technologies, Inc. Dba Insight Technology Division Div Insight Technology Division |
| A3187172 | 3/2 Design control — primary reference U.S. Government activity |
| A3187172 | 5/9 Secondary reference Universal Plastics Corporation Dba Universal Bath Systems |
NSN 5855-01-371-5645 is a Cap,lens, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5855, Night Vision Equipment, Emitted and Reflected Radiation. Status: active.
NSN 5855-01-371-5645 has 1 manufacturer part number on file: A3187172 (Northrop Grumman Systems Corporation).
Key specifications for A3187172: Overall Height: 0.220 INCHES NOMINAL IN; Overall Diameter: 2.050 INCHES NOMINAL IN; Overall Thickness: 1.930 INCHES NOMINAL IN; Material: PLASTIC. 4 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.