The Stem,fluid Valve, cataloged under National Stock Number 4820-01-422-1985, 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Supply Class 4820 (Valves, Nonpowered) of the Valves group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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
Stem,fluid Valve
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Technical Specifications
Parameter
Value
NSN
4820-01-422-1985
Item Name
Stem,fluid Valve
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 Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-422-402525147-03EPOSSIBLE MATCH
VALVE,DIAPHRAGM,STOP
Possible match (shared part number)Griswold Industries Dba Cla-Val Co
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
D/9Drawing number reference only
U.S. Government activity
25147 FIND 5-4
5/2Secondary reference
U.S. Government activity
24828-01E
3/2Design control — primary reference
U.S. Government activity
Related Parts
4820-01-422-4025POSSIBLE MATCH
VALVE,DIAPHRAGM,STOP
25147-03E
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 4820-01-422-1985?
NSN 4820-01-422-1985 is a Stem,fluid Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-422-1985?
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-422-4025, 4820-01-449-0640, 4820-01-449-0642. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-422-1985 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.