The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-411-8426, 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 12 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 | 4820-01-411-8426 |
| Primary Part Number | 40172-814 |
| 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 | PISTON, TOP GUIDED |
| Second End Relationship with First End | IDENTICAL |
| Body Style | TEE |
| Third End Relationship with Preceding Ends | IDENTICAL WITH FIRST END |
| First End Style Designator | SOCKET W/BRAZING RING |
| Material Document and Classification | MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| End Connection Quantity | 3 |
| First End Connection Type | UNTHREADED INTERNAL PIPE |
| Temp Adjustability | NOT ADJUSTABLE |
| Thermostatic Element | LIQUID IMMERSION TYPE |
| First End Nominal Pipe Size Accommodated | 1.000 INCHES IN |
| Material | COPPER ALLOY 922 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 |
|---|---|
| 40172-814 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
NSN 4820-01-411-8426 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 4820-01-411-8426 has 1 manufacturer part number on file: 40172-814 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
Key specifications for 40172-814: Flow Control Device: PISTON, TOP GUIDED; Second End Relationship with First End: IDENTICAL; Body Style: TEE; Third End Relationship with Preceding Ends: IDENTICAL WITH FIRST END. 12 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.