The Valve Assembly, cataloged under National Stock Number 4820-01-342-3183, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 7 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-342-3183 |
| Primary Part Number | LF909M1-QT-FS 2 |
| Item Name | Valve Assembly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Valve Quantity | 4 |
| Connection Type | THREADED INTERNAL PIPE |
| End Connection Quantity | 2 |
| Nominal Thread Size | 2.000 INCHES IN |
| Body Material | COPPER ALLOY |
| Thread Series Designator | NPT |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| LF909M1-QT-FS 2 PRIMARY | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| 909M1-QT | 5/9 Secondary reference Watts Regulator Company |
| 909M1QT 2IN | 3/9 Design control — primary reference Watts Regulator Company |
| 909-2IN | 5/9 Secondary reference Watts Regulator Company |
| LF 2 BFP 909M1QT | 5/9 Secondary reference Watts Regulator Company |
| LF909QT 2IN | 5/9 Secondary reference Watts Regulator Company |
| LF909M1QT-2 | 5/9 Secondary reference Watts Regulator Company |
NSN 4820-01-342-3183 is a Valve Assembly, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-342-3183 has 1 manufacturer part number on file: LF909M1-QT-FS 2 (Watts Regulator Company).
Key specifications for LF909M1-QT-FS 2: Valve Quantity: 4; Connection Type: THREADED INTERNAL PIPE; End Connection Quantity: 2; Nominal Thread Size: 2.000 INCHES IN. 7 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.