The Disk,valve, cataloged under National Stock Number 4820-01-123-1765, 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1 specification, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-123-1765
Item Name
Disk,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Material
COPPER 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.
3040-01-191-8373501-4675661 ITEM 8POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Ship Systems Command
4820-01-192-04804675661-0003POSSIBLE MATCH
PISTON,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5340-01-210-3202501-4675661 ITEM 13POSSIBLE MATCH
BRACKET,ANGLE
Possible match (shared part number)Naval Sea Systems Command
4820-01-210-6917501-4675661 ITEM 27POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Naval Ship Systems Command
4820-01-220-5758501-4675661 ITEM 26POSSIBLE MATCH
PLATE,LOCKING,VALVE
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
501-4675661 ITEM 2
5/2Secondary reference
U.S. Government activity
87643-6503 ITEM2
3/2Design control — primary reference
U.S. Government activity
87643-6503
D/9Drawing number reference only
U.S. Government activity
501-4675661
D/9Drawing number reference only
U.S. Government activity
Related Parts
3040-01-191-8373POSSIBLE MATCH
SHAFT,SHOULDERED
501-4675661 ITEM 8
4820-01-192-0480POSSIBLE MATCH
PISTON,VALVE
4675661-0003
5340-01-210-3202POSSIBLE MATCH
BRACKET,ANGLE
501-4675661 ITEM 13
4820-01-210-6917POSSIBLE MATCH
SEAT,VALVE
501-4675661 ITEM 27
4820-01-220-5758POSSIBLE MATCH
PLATE,LOCKING,VALVE
501-4675661 ITEM 26
Frequently Asked Questions
What is NSN 4820-01-123-1765?
NSN 4820-01-123-1765 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-123-1765?
5 possible matches (shared part number, not a government interchangeability claim): 3040-01-191-8373, 4820-01-192-0480, 5340-01-210-3202. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-123-1765?
Key specifications for 4820-01-123-1765: Material: COPPER ALLOY. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-123-1765 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.