The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-023-7757, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Raytheon Company Div Corp. 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-023-7757 |
| Primary Part Number | 855456-1 |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Raytheon Company Div Corp |
| Status | ACTIVE |
| Second End Relationship with First End | IDENTICAL |
| Body Style | TEE |
| Face to Face Distance | 9.000 INCHES NOMINAL IN |
| Third End Relationship with Preceding Ends | NOT IDENTICAL WITH FIRST OR SECOND END |
| Bulb Length | 13.188 INCHES NOMINAL IN |
| Bulb Diameter | 1.000 INCHES NOMINAL IN |
| Temp Rating | 80.0 FAHRENHEIT MINIMUM AND 120.0 FAHRENHEIT MAXIMUM DEGF |
| First Connection Face to Centerline Distance | 5.880 INCHES NOMINAL IN |
| End Connection Quantity | 3 |
| Mounting Facility | FLANGE |
| Capillary Tube Length | 12.000 INCHES NOMINAL IN |
| First End Connection Type | PLAIN FACE FLANGE |
| Temp Adjustability | ADJUSTABLE |
| Thermostatic Element | LIQUID IMMERSION TYPE |
| Material | COPPER ALLOY BODY |
| Material | COPPER ALLOY BULB |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 855456-1 PRIMARY | Raytheon Company Div Corp (USA) |
| Reference | Meaning |
|---|---|
| 4820PL1867302 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 975-D | 5/9 Secondary reference Lawler Manufacturing Company, Inc. |
| 855456-1 | 5/9 Secondary reference Raytheon Company Dba Raytheon Co |
| MIL-DTL-19772B | 5/9 Secondary reference U.S. Government activity |
| M19772-A1N1032 | 5/9 Secondary reference U.S. Government activity |
| 855456 | D/9 Drawing number reference only Raytheon Company Div Corp |
| 4820PL2214305 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4820-01-023-7757 is a Valve,regulating,temperature, manufactured by Raytheon Company Div Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-023-7757 has 1 manufacturer part number on file: 855456-1 (Raytheon Company Div Corp).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-143-2864, 4820-01-183-2336. Verify interchangeability with system specifications before substitution.
Key specifications for 855456-1: Second End Relationship with First End: IDENTICAL; Body Style: TEE; Face to Face Distance: 9.000 INCHES NOMINAL IN; Third End Relationship with Preceding Ends: NOT IDENTICAL WITH FIRST OR SECOND END. 16 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). 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.