The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-262-3203, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-262-3203 |
| Primary Part Number | 40278-201 |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| Status | ACTIVE |
| First End Bolt Hole Quantity | 8 |
| Flow Control Device | PISTON, TOP GUIDED |
| Second End Relationship with First End | IDENTICAL |
| Body Style | TEE |
| Face to Face Distance | 10.625 INCHES NOMINAL IN |
| First End Flange Thickness | 0.687 INCHES NOMINAL IN |
| First End Flange Outside Diameter | 9.000 INCHES NOMINAL IN |
| Third End Relationship with Preceding Ends | IDENTICAL WITH FIRST END |
| First End Style Designator | PLAIN |
| First Connection Face to Centerline Distance | 5.375 INCHES NOMINAL IN |
| First End Bolt Hole Diameter | 0.750 INCHES NOMINAL IN |
| First End Bolt Circle Diameter | 7.500 INCHES NOMINAL IN |
| End Connection Quantity | 3 |
| First End Connection Type | PLAIN FACE FLANGE |
| Temp Adjustability | ADJUSTABLE |
| First End Flange Shape Style | ROUND W/ BOLT HOLES |
| Material | COPPER ALLOY BODY |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE PACKING |
| Material | STEEL CORROSION RESISTING STEM |
| 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 |
|---|---|
| 40278-201 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 40278-2 AND CDS 40558 | 5/9 Secondary reference Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
NSN 4820-01-262-3203 is a Valve,regulating,temperature, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-262-3203 has 1 manufacturer part number on file: 40278-201 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-630-1357. Verify interchangeability with system specifications before substitution.
Key specifications for 40278-201: First End Bolt Hole Quantity: 8; Flow Control Device: PISTON, TOP GUIDED; Second End Relationship with First End: IDENTICAL; Body Style: TEE. 19 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.