The Regulator,thermostatic Temperatu, cataloged under National Stock Number 4820-00-421-9530, 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 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-421-9530 |
| Primary Part Number | XBM-1019 FW55-6A |
| Item Name | Regulator,thermostatic Temperatu |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Electric Co Alco Controls Div |
| Status | ACTIVE |
| Bulb Diameter | 0.625 INCHES NOMINAL IN |
| Capillary Tube Length | 360.000 INCHES NOMINAL IN |
| Thermostat Type | BULB |
| Usage Design | CONTROL VALVE FLOW |
| 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 |
|---|---|
| XBM-1019 FW55-6A PRIMARY | Emerson Electric Co Alco Controls Div (USA) |
| Reference | Meaning |
|---|---|
| XB1024 FW55-6A | 5/9 Secondary reference Emerson Electric Co Alco Controls Div |
| X-23048 FW55-6A | 5/9 Secondary reference Emerson Electric Co Alco Controls Div |
NSN 4820-00-421-9530 is a Regulator,thermostatic Temperatu, manufactured by Emerson Electric Co Alco Controls Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-421-9530 has 1 manufacturer part number on file: XBM-1019 FW55-6A (Emerson Electric Co Alco Controls Div).
Key specifications for XBM-1019 FW55-6A: Bulb Diameter: 0.625 INCHES NOMINAL IN; Capillary Tube Length: 360.000 INCHES NOMINAL IN; Thermostat Type: BULB; Usage Design: CONTROL VALVE FLOW. 4 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.