The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-328-1829, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is National Foam Inc Dba National Foam Div National Foam. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-328-1829 |
| Primary Part Number | 1231-1409-3 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | National Foam Inc Dba National Foam Div National Foam |
| Status | ACTIVE |
| Flow Control Device | DISK, DUAL |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| End Connection Quantity | 2 |
| First End Connection Type | THREADED INTERNAL PIPE |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | IRON CAST BODY |
| Thread Size and Series/type Designator | 1-1/2-11-1/2 NPT FIRST END |
| Filter | NOT INCLUDED |
| 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 |
|---|---|
| 1231-1409-3 PRIMARY | National Foam Inc Dba National Foam Div National Foam (USA) |
| Reference | Meaning |
|---|---|
| 1-1/2 IN. UFC48344 | 5/9 Secondary reference National Foam Inc Dba National Foam Div National Foam |
| C-39-19-B | 5/9 Secondary reference National Foam Inc Dba National Foam Div National Foam |
NSN 4820-01-328-1829 is a Valve,regulating,fluid Pressure, manufactured by National Foam Inc Dba National Foam Div National Foam, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-328-1829 has 1 manufacturer part number on file: 1231-1409-3 (National Foam Inc Dba National Foam Div National Foam).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-330-0036. Verify interchangeability with system specifications before substitution.
Key specifications for 1231-1409-3: Flow Control Device: DISK, DUAL; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU. 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.