The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-371-5813, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Teco-Westinghouse Motor Company. Government technical data includes 16 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-371-5813 |
| Primary Part Number | 4550B43-4.00IN |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Teco-Westinghouse Motor Company |
| Status | ACTIVE |
| Flow Control Device | DOUBLE SEATED |
| Two-Way Valve Action | REVERSE ACTING |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| Face to Face Distance | 10.120 INCHES NOMINAL IN |
| First End Flange Outside Diameter | 4.000 INCHES NOMINAL IN |
| First End Style Designator | PLAIN |
| Bulb Length | 40.000 INCHES NOMINAL IN |
| Temp Rating | 60.0 FAHRENHEIT MINIMUM AND 120.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 2 |
| Capillary Tube Length | 120.000 INCHES NOMINAL IN |
| First End Connection Type | PLAIN FACE FLANGE |
| Temp Adjustability | ADJUSTABLE |
| First End Flange Shape Style | ROUND W/ BOLT HOLES |
| Thermostatic Element | FINNED |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| 4550B43-4.00IN PRIMARY | Teco-Westinghouse Motor Company (USA) |
NSN 4820-01-371-5813 is a Valve,regulating,temperature, manufactured by Teco-Westinghouse Motor Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-371-5813 has 1 manufacturer part number on file: 4550B43-4.00IN (Teco-Westinghouse Motor Company).
Key specifications for 4550B43-4.00IN: Flow Control Device: DOUBLE SEATED; Two-Way Valve Action: REVERSE ACTING; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU. 16 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.