The Valve,diaphragm,stop, cataloged under National Stock Number 4820-01-422-4025, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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: Cancelled.
Catalog Facts
Item Name
Valve,diaphragm,stop
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Technical Specifications
Parameter
Value
NSN
4820-01-422-4025
Item Name
Valve,diaphragm,stop
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
CANCELLED
Lifecycle & Compliance
Acquisition Status
CANCELLED
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.
4820-01-449-064024873-01APOSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Griswold Industries Dba Cla-Val Co
4820-01-449-064224870-01GPOSSIBLE MATCH
RETAINER,DISK,VALVE
Possible match (shared part number)Griswold Industries Dba Cla-Val Co
4820-01-449-064324872-01CPOSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Griswold Industries Dba Cla-Val Co
4820-01-449-0652C0777HPOSSIBLE MATCH
GUIDE,VALVE STEM
Possible match (shared part number)Griswold Industries Dba Cla-Val Co
4820-01-449-107925147-01JPOSSIBLE MATCH
VALVE,DIAPHRAGM,STOP
Possible match (shared part number)Griswold Industries Dba Cla-Val Co
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
25147-03E
3/2Design control — primary reference
U.S. Government activity
22400-03A
C/1Advisory reference — outside the item-of-supply concept
U.S. Government activity
25147
D/9Drawing number reference only
U.S. Government activity
Related Parts
4820-01-449-0640POSSIBLE MATCH
STEM,FLUID VALVE
24873-01A
4820-01-449-0642POSSIBLE MATCH
RETAINER,DISK,VALVE
24870-01G
4820-01-449-0643POSSIBLE MATCH
STEM,FLUID VALVE
24872-01C
4820-01-449-0652POSSIBLE MATCH
GUIDE,VALVE STEM
C0777H
4820-01-449-1079POSSIBLE MATCH
VALVE,DIAPHRAGM,STOP
25147-01J
Frequently Asked Questions
What is NSN 4820-01-422-4025?
NSN 4820-01-422-4025 is a Valve,diaphragm,stop, classified under FSC 4820, Valves, Nonpowered. Status: cancelled.
What NSN replaces 4820-01-422-4025?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-449-0640, 4820-01-449-0642, 4820-01-449-0643. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-422-4025 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.
Is NSN 4820-01-422-4025 still in active supply?
NSN 4820-01-422-4025 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.