The Indicator,pressure, cataloged under National Stock Number 6685-01-554-8821, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Naval Sea Systems Command. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Indicator,pressure |
| FSC / FSG | 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments (FSG 66) |
| Manufacturers | Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 6685-01-554-8821 |
| Primary Part Number | 7550478-DES-021704-11 |
| Item Name | Indicator,pressure |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7550478-DES-021704-11 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| G547-0002-DES-021704-11 | 5/2 Secondary reference U.S. Government activity |
| 7550478 | D/9 Drawing number reference only Naval Sea Systems Command |
| DES-021704 ITEM 11 | 5/2 Secondary reference U.S. Government activity |
| DES-021704-11 | 5/2 Secondary reference U.S. Government activity |
NSN 6685-01-554-8821 is a Indicator,pressure, manufactured by Naval Sea Systems Command, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-554-8821 has 1 manufacturer part number on file: 7550478-DES-021704-11 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-559-3131. Verify interchangeability with system specifications before substitution.
Possible hazard — SDS may be required (DLA HMIC P). 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.