The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-577-3798, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-577-3798 |
| Primary Part Number | 40397-416 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Body Style | STRAIGHT THRU |
| Face to Face Distance | 9.250 INCHES NOMINAL IN |
| Material Document and Classification | UNABLE TO DECODE |
| End Connection Quantity | 2 |
| Valve Size | 0.500 INCHES IN |
| Valve Loading Method | SPRING |
| Material | COPPER ALLOY 922 BODY |
| Media for Which Designed | WATER, SALT AND WATER, FRESH |
| 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 |
|---|---|
| 40397-4 ASSEMBLY 40397-416 | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| 40397-416 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
NSN 4820-01-577-3798 is a Valve,regulating,fluid Pressure, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-577-3798 has 2 manufacturer part numbers on file: 40397-4 ASSEMBLY 40397-416 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40397-416 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
Key specifications for 40397-416: Flow Control Device: DISK; Body Style: STRAIGHT THRU; Face to Face Distance: 9.250 INCHES NOMINAL IN; Material Document and Classification: UNABLE TO DECODE. 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.