The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-540-8573, 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 9 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-540-8573 |
| Primary Part Number | 40066-206 |
| Item Name | Valve,regulating,temperature |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| Status | ACTIVE |
| Flow Control Device | BELLOWS |
| Material Document and Classification | MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| End Connection Quantity | 2 |
| Valve Size | 2.500 INCHES IN |
| Specification/standard Data | 81349 - MIL-V-19772 GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | II TYPE AND 2 CLASS AND 250 SERIES |
| Material | COPPER ALLOY 922 BODY |
| Media for Which Designed | WATER |
| End Connection Spec/std | MIL-F-20042C |
| 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 |
|---|---|
| 40066-206 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| 40700 ITEM 018 | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| 40066-2 ASSY 40066-206 | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
NSN 4820-01-540-8573 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 4820-01-540-8573 has 3 manufacturer part numbers on file: 40066-206 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40700 ITEM 018 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40066-2 ASSY 40066-206 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
Key specifications for 40066-206: Flow Control Device: BELLOWS; Material Document and Classification: MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE BODY; End Connection Quantity: 2; Valve Size: 2.500 INCHES IN. 9 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.