The Ls4 Assembly, cataloged under National Stock Number 6685-01-546-7992, 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 Northrop Grumman Systems Corporation. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Item Name | Ls4 Assembly |
| FSC / FSG | 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments (FSG 66) |
| Manufacturers | Northrop Grumman Systems Corporation (CAGE 03956) |
| Parameter | Value |
|---|---|
| NSN | 6685-01-546-7992 |
| Primary Part Number | 4801569-3 |
| Item Name | Ls4 Assembly |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Northrop Grumman Systems Corporation |
| 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 |
|---|---|
| 4801569-3 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 4801431-6 IT/POSIT NO 45 | Northrop Grumman Systems Corporation (USA) |
| PL4804276-5 REV A ITEM NO. 45 | Northrop Grumman Systems Corporation (USA) |
| PL4804276-6 REV A ITEM NO. 45 | Northrop Grumman Systems Corporation (USA) |
NSN 6685-01-546-7992 is a Ls4 Assembly, manufactured by Northrop Grumman Systems Corporation, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-546-7992 has 4 manufacturer part numbers on file: 4801569-3 (Northrop Grumman Systems Corporation), 4801431-6 IT/POSIT NO 45 (Northrop Grumman Systems Corporation), PL4804276-5 REV A ITEM NO. 45 (Northrop Grumman Systems Corporation), PL4804276-6 REV A ITEM NO. 45 (Northrop Grumman Systems Corporation).
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.