The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-259-2720, 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 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-259-2720 |
| Primary Part Number | 40057-01/50169-02 |
| 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 | DIAPHRAGM |
| Two-Way Valve Action | DIRECT ACTING |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| Face to Face Distance | 8.375 INCHES NOMINAL IN |
| First End Style Designator | PLAIN |
| Bulb Length | 1.625 INCHES NOMINAL IN |
| Bulb Diameter | 2.000 INCHES NOMINAL IN |
| Temp Rating | 72.0 FAHRENHEIT NOMINAL DEGF |
| End Connection Quantity | 2 |
| Mounting Facility | BRACKET |
| Capillary Tube Length | 54.000 INCHES NOMINAL IN |
| First End Connection Type | PLAIN FACE FLANGE |
| Temp Adjustability | ADJUSTABLE |
| First End Flange Shape Style | ROUND W/ BOLT HOLES |
| Thermostatic Element | INTEGRAL W/VALVE |
| Material | COPPER ALLOY BODY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 40057-01/50169-02 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 3258003 | 7/2 Vendor item drawing reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 4820-01-259-2720 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 4820-01-259-2720 has 1 manufacturer part number on file: 40057-01/50169-02 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
Key specifications for 40057-01/50169-02: First End Bolt Hole Quantity: 8; Flow Control Device: DIAPHRAGM; Two-Way Valve Action: DIRECT ACTING; Second End Relationship with First End: IDENTICAL. 18 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.