The Stem,fluid Valve, cataloged under National Stock Number 4820-01-162-8989, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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.
Technical Specifications
Parameter
Value
NSN
4820-01-162-8989
Item Name
Stem,fluid Valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Largest Outside Diameter
0.750 INCHES NOMINAL IN
Material
NICKEL ALLOY
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.
4730-01-189-66614775911-0001POSSIBLE MATCH
MANIFOLD,HYDRAULIC SYSTEM ACCESS
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-191-36494775506-0002POSSIBLE MATCH
MANIFOLD ASSEMBLY,HYDRAULIC
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-191-36514775506-0003POSSIBLE MATCH
MANIFOLD ASSEMBLY,HYDRAULIC
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-191-36529444-13-0000POSSIBLE MATCH
MANIFOLD,HYDRAULIC SYSTEM ACCESS
Possible match (shared part number)Purolator Facet Inc. Div Parker Aerospace Filtration Division Dba Purolator Facet, in
4820-01-406-8400POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
87794-3301 ITEM 58
3/2Design control — primary reference
U.S. Government activity
518-4775506
D/9Drawing number reference only
U.S. Government activity
518-4775506
5/9Secondary reference
U.S. Government activity
516-4775911
5/9Secondary reference
U.S. Government activity
4775911 ITEM 32
C/1Advisory reference — outside the item-of-supply concept
U.S. Government activity
87794-3301
D/9Drawing number reference only
U.S. Government activity
516-4775911 ITEM 32
5/9Secondary reference
U.S. Government activity
Related Parts
4730-01-189-6661POSSIBLE MATCH
MANIFOLD,HYDRAULIC SYSTEM ACCESS
4775911-0001
4730-01-191-3649POSSIBLE MATCH
MANIFOLD ASSEMBLY,HYDRAULIC
4775506-0002
4730-01-191-3651POSSIBLE MATCH
MANIFOLD ASSEMBLY,HYDRAULIC
4775506-0003
4730-01-191-3652POSSIBLE MATCH
MANIFOLD,HYDRAULIC SYSTEM ACCESS
9444-13-0000
4820-01-406-8400POSSIBLE MATCH
STEM,FLUID VALVE
Frequently Asked Questions
What is NSN 4820-01-162-8989?
NSN 4820-01-162-8989 is a Stem,fluid Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-162-8989?
5 possible matches (shared part number, not a government interchangeability claim): 4730-01-189-6661, 4730-01-191-3649, 4730-01-191-3651. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-162-8989?
Key specifications for 4820-01-162-8989: Largest Outside Diameter: 0.750 INCHES NOMINAL IN; Overall Length: 4.060 INCHES NOMINAL IN; Material: NICKEL ALLOY. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-162-8989 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.