The Seat,valve, cataloged under National Stock Number 4820-00-920-3632, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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
4820-00-920-3632
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
FSC Application Data
COCK,POPPET DRAIN,HYDRAULIC SYSTEM,AIRCRAFT
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 Items3
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5305-01-273-495718888POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)Sps Technologies, Llc Dba PB Fasteners
4820-01-368-347918888POSSIBLE MATCH
DISK,FLUID
Possible match (shared part number)Circor Aerospace, Inc. Dba Circor Aerospace Inc
5935-01-370-444018888POSSIBLE MATCH
CONNECTOR,RECEPTACLE,ELECTRICAL
Possible match (shared part number)Brunswick Corp Dba Mercury Marine Div Mercury Marine
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
18888
3/2Design control — primary reference
U.S. Government activity
Related Parts
5305-01-273-4957POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
18888
4820-01-368-3479POSSIBLE MATCH
DISK,FLUID
18888
5935-01-370-4440POSSIBLE MATCH
CONNECTOR,RECEPTACLE,ELECTRICAL
18888
Frequently Asked Questions
What is NSN 4820-00-920-3632?
NSN 4820-00-920-3632 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-00-920-3632?
3 possible matches (shared part number, not a government interchangeability claim): 5305-01-273-4957, 4820-01-368-3479, 5935-01-370-4440. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-00-920-3632?
Key specifications for 4820-00-920-3632: FSC Application Data: COCK,POPPET DRAIN,HYDRAULIC SYSTEM,AIRCRAFT. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-00-920-3632 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.