The Dampener,fluid Pressure, cataloged under National Stock Number 6685-01-643-0540, 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 Inventory Control Point Mechanicsburg. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Dampener,fluid Pressure |
| FSC / FSG | 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments (FSG 66) |
| Manufacturers | Naval Inventory Control Point Mechanicsburg (CAGE 03950) |
| Parameter | Value |
|---|---|
| NSN | 6685-01-643-0540 |
| Primary Part Number | 592-7286833-22D4 |
| Item Name | Dampener,fluid Pressure |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 592-7286833-22D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| H547-0001-H7284701-22MD4 | Naval Inventory Control Point Mechanicsburg (USA) |
| H728-4701-22D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 7383858-H7284701-22MD4 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| H728-4701-22 | 5/1 Secondary reference U.S. Government activity |
| 592-7286833-22 | 5/1 Secondary reference Naval Sea Systems Command |
| 7383858-H7284701-22M | 3/1 Design control — primary reference Naval Sea Systems Command |
| H547-0001-H7284701-22M | 5/1 Secondary reference U.S. Government activity |
NSN 6685-01-643-0540 is a Dampener,fluid Pressure, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-643-0540 has 4 manufacturer part numbers on file: 592-7286833-22D4 (Naval Inventory Control Point Mechanicsburg), H547-0001-H7284701-22MD4 (Naval Inventory Control Point Mechanicsburg), H728-4701-22D4 (Naval Inventory Control Point Mechanicsburg), 7383858-H7284701-22MD4 (Naval Inventory Control Point Mechanicsburg).
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.