Pressure Rating: 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
Temp Rating: -40.0 FAHRENHEIT MINIMUM AND 275.0 FAHRENHEIT MAXIMUM DEGF
Style Designator: POPPET
Media for Which Designed: HYDRAULIC FLUID
Identification
NSN: 1650-01-451-3661
NIIN: 014513661
FSC: 1650 — Aircraft Hydraulic, Vacuum, and De-icing System Components
FSG: 16 — Aircraft Components and Accessories
General Description
The Disk,valve, cataloged under National Stock Number 1650-01-451-3661, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
1650-01-451-3661
Item Name
Disk,valve
FSC / FSG
1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components
Status
ACTIVE
Pressure Rating
3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
Temp Rating
-40.0 FAHRENHEIT MINIMUM AND 275.0 FAHRENHEIT MAXIMUM DEGF
Style Designator
POPPET
Media for Which Designed
HYDRAULIC FLUID
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.
4820-01-451-3784661R041POSSIBLE MATCH
TAILPIECE,VALVE
Possible match (shared part number)Aerocontrolex Group, Inc. Dba Aero Fluid Products
1650-01-451-3791541R066POSSIBLE MATCH
CAP,VALVE
Possible match (shared part number)Aerocontrolex Group, Inc. Dba Aero Fluid Products
1650-01-451-3795351R305POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)Aerocontrolex Group, Inc. Dba Aero Fluid Products
4820-01-451-4098441R093POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Aerocontrolex Group, Inc. Dba Aero Fluid Products
4820-01-451-4102431R186POSSIBLE MATCH
RETAINER,DISK,VALVE
Possible match (shared part number)Aerocontrolex Group, Inc. Dba Aero Fluid Products
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
351R192
3/2Design control — primary reference
U.S. Government activity
1402R004
D/9Drawing number reference only
U.S. Government activity
1402R004 ITEM 19
5/2Secondary reference
U.S. Government activity
Related Parts
4820-01-451-3784POSSIBLE MATCH
TAILPIECE,VALVE
661R041
1650-01-451-3791POSSIBLE MATCH
CAP,VALVE
541R066
1650-01-451-3795POSSIBLE MATCH
DISK,VALVE
351R305
4820-01-451-4098POSSIBLE MATCH
SEAT,VALVE
441R093
4820-01-451-4102POSSIBLE MATCH
RETAINER,DISK,VALVE
431R186
Frequently Asked Questions
What is NSN 1650-01-451-3661?
NSN 1650-01-451-3661 is a Disk,valve, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
What NSN replaces 1650-01-451-3661?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-451-3784, 1650-01-451-3791, 1650-01-451-3795. Verify interchangeability with system specifications before substitution.
What are the specifications of 1650-01-451-3661?
Key specifications for 1650-01-451-3661: Pressure Rating: 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Temp Rating: -40.0 FAHRENHEIT MINIMUM AND 275.0 FAHRENHEIT MAXIMUM DEGF; Style Designator: POPPET; Special Features: M2 POPPET FOR FLUID REGULATORS CORP. PART NUMBER BD2445-01 PRIORITY VALVE. 4 specifications are documented in the U.S. Government catalog.
Is NSN 1650-01-451-3661 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.