The Seat,valve, cataloged under National Stock Number 4820-01-534-2969, 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1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-534-2969
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Material
PLASTIC SEAT
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 Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-534-8952845-4558742 ASSY BP, A-CPOSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Naval Ship Systems Command
4820-01-534-8960845-4558742 ITEM 57POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Naval Ship Systems Command
4820-01-534-8967845-4558742 ITEM 55, 57POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Naval Ship Systems Command
4820-01-534-8974845-4558742 ASSY AP,LKG DVC A-CPOSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Naval Ship Systems Command
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
4558742
D/9Drawing number reference only
U.S. Government activity
2642-785-10 ITEM 58
5/2Secondary reference
U.S. Government activity
845-4558742 ITEM 58
3/2Design control — primary reference
U.S. Government activity
Related Parts
4820-01-534-8952POSSIBLE MATCH
VALVE,BALL
845-4558742 ASSY BP, A-C
4820-01-534-8960POSSIBLE MATCH
SEAT,VALVE
845-4558742 ITEM 57
4820-01-534-8967POSSIBLE MATCH
PARTS KIT,BALL VALVE
845-4558742 ITEM 55, 57
4820-01-534-8974POSSIBLE MATCH
VALVE,BALL
845-4558742 ASSY AP,LKG DVC A-C
Frequently Asked Questions
What is NSN 4820-01-534-2969?
NSN 4820-01-534-2969 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-534-2969?
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-534-8952, 4820-01-534-8960, 4820-01-534-8967. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-534-2969?
Key specifications for 4820-01-534-2969: Part Name Assigned by Controlling Agency: SEAT, 1.748 X 1.000 X 0.313 THK, ZYTEL 45HSB; End Item Identification: VIRGINIA CLASS SSN-774; Material: PLASTIC SEAT. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-534-2969 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.