The Valve,regulating,system Pressure, cataloged under National Stock Number 4820-01-283-2533, 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 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-283-2533 |
| Primary Part Number | 042689 |
| Item Name | Valve,regulating,system Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Electric Co Alco Controls Div |
| Status | ACTIVE |
| Body Style | ANGLE |
| First End Style Designator | SOCKET |
| End Connection Quantity | 2 |
| First End Connection Type | UNTHREADED INTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 0.375 INCHES NOMINAL IN |
| Media for Which Designed | REFRIGERANT, NONCORROSIVE |
| 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 |
|---|---|
| 042689 PRIMARY | Emerson Electric Co Alco Controls Div (USA) |
| TCLN1FW 3/8 X 5/8-1C | Emerson Electric Co Alco Controls Div (USA) |
| Reference | Meaning |
|---|---|
| TCLEN1FW 3/8 X 5/8-1C | 5/9 Secondary reference Copeland Corp |
| TCLEN1FW | C/1 Advisory reference — outside the item-of-supply concept Copeland Corp |
NSN 4820-01-283-2533 is a Valve,regulating,system Pressure, manufactured by Emerson Electric Co Alco Controls Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-283-2533 has 2 manufacturer part numbers on file: 042689 (Emerson Electric Co Alco Controls Div), TCLN1FW 3/8 X 5/8-1C (Emerson Electric Co Alco Controls Div).
Key specifications for 042689: Body Style: ANGLE; First End Style Designator: SOCKET; End Connection Quantity: 2; First End Connection Type: UNTHREADED INTERNAL TUBE. 6 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.