The Regulator,thermostatic Temperatu, cataloged under National Stock Number 4820-01-414-5581, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Schneider Electric Systems Usa Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-414-5581 |
| Primary Part Number | RT1009-A1/3 /E83F438/185T225 DEG |
| Item Name | Regulator,thermostatic Temperatu |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Schneider Electric Systems Usa Inc |
| Status | ACTIVE |
| Bulb Length | 20.000 INCHES NOMINAL IN |
| Bulb Diameter | 1.500 INCHES NOMINAL IN |
| Mounting Method | THREADED |
| Capillary Tube Length | 120.000 INCHES NOMINAL IN |
| Valve Size for Which Designed | 1.000 INCHES IN |
| Operating Temp Rating | 185.0 FAHRENHEIT NOMINAL AND 225.0 FAHRENHEIT NOMINAL DEGF |
| Thermostat Type | BULB |
| Usage Design | REGULATE TEMPERATURE |
| 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 |
|---|---|
| RT1009-A1/3 /E83F438/185T225 DEG PRIMARY | Schneider Electric Systems Usa Inc (USA) |
| RT100-A1 UPPER ASSY PRIMARY | Schneider Electric Systems Usa Inc (USA) |
| Reference | Meaning |
|---|---|
| RT1009-A1 UPPER | C/1 Advisory reference — outside the item-of-supply concept Schneider Electric Systems Usa Inc |
| RT1009-A1/3"/E8 | C/1 Advisory reference — outside the item-of-supply concept Schneider Electric Systems Usa Inc |
NSN 4820-01-414-5581 is a Regulator,thermostatic Temperatu, manufactured by Schneider Electric Systems Usa Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-414-5581 has 2 manufacturer part numbers on file: RT1009-A1/3 /E83F438/185T225 DEG (Schneider Electric Systems Usa Inc), RT100-A1 UPPER ASSY (Schneider Electric Systems Usa Inc).
Key specifications for RT1009-A1/3 /E83F438/185T225 DEG: Bulb Length: 20.000 INCHES NOMINAL IN; Bulb Diameter: 1.500 INCHES NOMINAL IN; Mounting Method: THREADED; Capillary Tube Length: 120.000 INCHES NOMINAL IN. 8 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.