The Valve,expansion, cataloged under National Stock Number 4820-01-531-6850, 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 13 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-531-6850 |
| Primary Part Number | 056856 |
| Item Name | Valve,expansion |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Electric Co Alco Controls Div |
| Status | ACTIVE |
| Valve Equalizer Location | EXTERNAL |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| First End Style Designator | SOCKET |
| Refrigeration Capacity in Btu Per Hour | 0.50 |
| End Connection Quantity | 2 |
| Capillary Tube Length | 240.000 INCHES NOMINAL IN |
| First End Connection Type | UNTHREADED INTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 0.625 INCHES NOMINAL IN |
| Material | COPPER ALLOY BODY |
| Valve Expansion Control Type | THERMOSTATIC |
| Media for Which Designed | REFRIGERANT 12 |
| Valve Pressure Limiting Device | INCLUDED |
| 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 |
|---|---|
| 056856 PRIMARY | Emerson Electric Co Alco Controls Div (USA) |
| 90-C--02--2793 | Carrier Corp (USA) |
| TCLN 1/2FW 1/2X1/2 20FT TB EXTNL | Emerson Electric Co Alco Controls Div (USA) |
| 90-C--02--2793 | Emerson Electric Co Alco Controls Div (USA) |
NSN 4820-01-531-6850 is a Valve,expansion, manufactured by Emerson Electric Co Alco Controls Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-531-6850 has 4 manufacturer part numbers on file: 056856 (Emerson Electric Co Alco Controls Div), 90-C--02--2793 (Carrier Corp), TCLN 1/2FW 1/2X1/2 20FT TB EXTNL (Emerson Electric Co Alco Controls Div), 90-C--02--2793 (Emerson Electric Co Alco Controls Div).
Key specifications for 056856: Valve Equalizer Location: EXTERNAL; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU; First End Style Designator: SOCKET. 13 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.