The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-327-4976, 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 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-327-4976 |
| Primary Part Number | 40172 WITH 50155-02 BULB |
| 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, SPRING LOADED |
| 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 |
| End Connection Quantity | 3 |
| First End Connection Type | UNTHREADED INTERNAL TUBE |
| Temp Adjustability | ADJUSTABLE |
| First End Outside Diameter Tube Accommodated | 1.000 INCHES NOMINAL IN |
| 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 |
|---|---|
| 40172-402 | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| 40172 WITH 50155-02 BULB PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
NSN 4820-01-327-4976 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 4820-01-327-4976 has 2 manufacturer part numbers on file: 40172-402 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40172 WITH 50155-02 BULB (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
Key specifications for 40172 WITH 50155-02 BULB: Flow Control Device: PISTON, SPRING LOADED; Second End Relationship with First End: IDENTICAL; Body Style: TEE; Third End Relationship with Preceding Ends: IDENTICAL WITH FIRST END. 10 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.