The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-123-1641, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-123-1641 |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Second End Relationship with First End | IDENTICAL |
| Body Style | TEE |
| First End Style Designator | PLAIN |
| Temp Rating | 250.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 2 |
| Mounting Facility | EXTERNAL THREAD |
| First End Connection Type | UNTHREADED INTERNAL TUBE |
| Temp Adjustability | NOT ADJUSTABLE |
| Thermostatic Element | INTEGRAL W/VALVE |
| First End Outside Diameter Tube Accommodated | 0.125 INCHES NOMINAL IN |
| Material | COPPER BULB |
| Material | PLASTIC AND COPPER ALLOY BODY |
| Center to Center Distance | 0.565 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| QS4577 | D/9 Drawing number reference only Cooper Industries Inc Cooper Hand Tools Div Turner Plant |
| QS4577-1 | 3/9 Design control — primary reference Cooper Industries Inc Cooper Hand Tools Div Turner Plant |
NSN 4820-01-123-1641 is a Valve,regulating,temperature, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-123-1641: Flow Control Device: POPPET; Second End Relationship with First End: IDENTICAL; Body Style: TEE; First End Style Designator: PLAIN. 14 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.