The Valve Assembly, cataloged under National Stock Number 4820-01-660-1133, 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 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-660-1133 |
| Primary Part Number | LF909M1QT-Z2 1-1/4" |
| Item Name | Valve Assembly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Maximum Operating Temp and Media for Which Designed | 180.00 FAHRENHEIT WATER DEGF |
| Operating Pressure and Type | 175.00 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LBS |
| Valve Size | 1.25 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 |
|---|---|
| LF909M1QT-Z2 1-1/4" PRIMARY | Watts Regulator Company (USA) |
| 0391021 PRIMARY | Watts Regulator Company (USA) |
NSN 4820-01-660-1133 is a Valve Assembly, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-660-1133 has 2 manufacturer part numbers on file: LF909M1QT-Z2 1-1/4" (Watts Regulator Company), 0391021 (Watts Regulator Company).
Key specifications for LF909M1QT-Z2 1-1/4": Maximum Operating Temp and Media for Which Designed: 180.00 FAHRENHEIT WATER DEGF; Operating Pressure and Type: 175.00 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LBS; Valve Size: 1.25 INCHES IN; Body Material: COPPER ALLOY. 6 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.