The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-121-0725, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Valve,regulating,fluid Pressure
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Technical Specifications
Parameter
Value
NSN
4820-01-121-0725
Item Name
Valve,regulating,fluid Pressure
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-122-3976V2D10693-3TAPOSSIBLE MATCH
BODY,VALVE
Possible match (shared part number)Vacco Industries
4820-01-122-5675V2C11256-3TAPOSSIBLE MATCH
PLATE,PISTON,VALVE
Possible match (shared part number)Vacco Industries
4820-01-122-9490V2B10886-4MFPOSSIBLE MATCH
GUIDE,STEM
Possible match (shared part number)Vacco Industries
4820-01-129-5637V3C10158-621POSSIBLE MATCH
ORIFICE BLOCK AND DISK ASSEMBLY
Possible match (shared part number)Vacco Industries
4820-01-131-4917V2C11885-4MFPOSSIBLE MATCH
PISTON,VALVE
Possible match (shared part number)Vacco Industries
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
V3E10012
D/9Drawing number reference only
U.S. Government activity
V3E10012-02
3/2Design control — primary reference
U.S. Government activity
S1E10062ITEM2
3/2Design control — primary reference
U.S. Government activity
V3E10012-01
5/9Secondary reference
U.S. Government activity
Related Parts
4820-01-122-3976POSSIBLE MATCH
BODY,VALVE
V2D10693-3TA
4820-01-122-5675POSSIBLE MATCH
PLATE,PISTON,VALVE
V2C11256-3TA
4820-01-122-9490POSSIBLE MATCH
GUIDE,STEM
V2B10886-4MF
4820-01-129-5637POSSIBLE MATCH
ORIFICE BLOCK AND DISK ASSEMBLY
V3C10158-621
4820-01-131-4917POSSIBLE MATCH
PISTON,VALVE
V2C11885-4MF
Frequently Asked Questions
What is NSN 4820-01-121-0725?
NSN 4820-01-121-0725 is a Valve,regulating,fluid Pressure, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-121-0725?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-122-3976, 4820-01-122-5675, 4820-01-122-9490. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-121-0725 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.