The Valve,expansion, cataloged under National Stock Number 4820-01-444-7529, 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 10 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-444-7529 |
| Primary Part Number | HFS 1/4 FC 3/8X1/2 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Electric Co Alco Controls Div |
| Status | ACTIVE |
| Valve Equalizer Location | INTERNAL |
| Body Style | STRAIGHT THRU |
| Face to Face Distance | 5.000 INCHES NOMINAL IN |
| Bulb Length | 3.500 INCHES NOMINAL IN |
| Bulb Diameter | 0.500 INCHES NOMINAL IN |
| End Connection Quantity | 2 |
| Capillary Tube Length | 60.000 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Valve Expansion Control Type | THERMOSTATIC |
| Valve Equalizer Connection Type | FLARED TUBE |
| 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 |
|---|---|
| HFS 1/4 FC 3/8X1/2 PRIMARY | Emerson Electric Co Alco Controls Div (USA) |
| 90-C-02-2274 | Carrier Corp (USA) |
| 90B2-644-456 | Carrier Corp (USA) |
NSN 4820-01-444-7529 is a Valve,expansion, manufactured by Emerson Electric Co Alco Controls Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-444-7529 has 3 manufacturer part numbers on file: HFS 1/4 FC 3/8X1/2 (Emerson Electric Co Alco Controls Div), 90-C-02-2274 (Carrier Corp), 90B2-644-456 (Carrier Corp).
Key specifications for HFS 1/4 FC 3/8X1/2: Valve Equalizer Location: INTERNAL; Body Style: STRAIGHT THRU; Face to Face Distance: 5.000 INCHES NOMINAL IN; Bulb Length: 3.500 INCHES NOMINAL IN. 10 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.