The Regulator,thermostatic Temperatu, cataloged under National Stock Number 4820-01-450-7273, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Electric Co Alco Controls Div. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-450-7273 |
| Primary Part Number | X5409YL1A |
| Item Name | Regulator,thermostatic Temperatu |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Electric Co Alco Controls Div |
| Status | ACTIVE |
| Mounting Method | FLANGE |
| Capillary Tube Length | 60.000 INCHES NOMINAL IN |
| Usage Design | REGULATES PRESSURE AND TEMPERATURE IN ALCO CONTROLS THERMAL EXPANSION VALVES |
| 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 |
|---|---|
| X5409YL1A PRIMARY | Emerson Electric Co Alco Controls Div (USA) |
| X5409YL1A | Williams and Co Inc (USA) |
| Reference | Meaning |
|---|---|
| X54091YL1A | 5/9 Secondary reference Emerson Electric Co Alco Controls Div |
| X5409YL1A | 5/9 Secondary reference Progress Supply, Inc. |
NSN 4820-01-450-7273 is a Regulator,thermostatic Temperatu, manufactured by Emerson Electric Co Alco Controls Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-450-7273 has 2 manufacturer part numbers on file: X5409YL1A (Emerson Electric Co Alco Controls Div), X5409YL1A (Williams and Co Inc).
Key specifications for X5409YL1A: Mounting Method: FLANGE; Capillary Tube Length: 60.000 INCHES NOMINAL IN; Special Features: INTERNAL EQUALIZER; Part Name Assigned by Controlling Agency: POWER ASSY.. 3 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.