The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-504-2580, 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 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-504-2580 |
| Primary Part Number | 40397-910 |
| 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 |
| Regulation Type | MANUAL SINGLE STAGE |
| Material Document and Classification | UNABLE TO DECODE |
| End Connection Quantity | 2 |
| Manual Control Method | SCREW |
| Valve Loading Method | SPRING |
| Specification/standard Data | 81349-MIL-V-2042E (SH) GOVERNMENT SPECIFICATION |
| Material | COPPER ALLOY 922 BODY |
| Media for Which Designed | WATER, SALT |
| Furnished Items | UNION NUT AND TAILPIECE W/GROOVES |
| 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 |
|---|---|
| 40397-9 ASSY 40397-910 | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| 40397-910 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 40397-9 | D/9 Drawing number reference only Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
NSN 4820-01-504-2580 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 4820-01-504-2580 has 2 manufacturer part numbers on file: 40397-9 ASSY 40397-910 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40397-910 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-665-5183. Verify interchangeability with system specifications before substitution.
Key specifications for 40397-910: Flow Control Device: DISK; Body Style: STRAIGHT THRU; Regulation Type: MANUAL SINGLE STAGE; Material Document and Classification: UNABLE TO DECODE. 11 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.