The Deflector,dirt and Liquid, cataloged under National Stock Number 4320-01-423-3426, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
4320-01-423-3426
Item Name
Deflector,dirt and Liquid
FSC / FSG
4320 / 43 — Power and Hand Pumps
Status
ACTIVE
Outside Diameter
5.250 INCHES NOMINAL IN
Inside Diameter
3.189 INCHES NOMINAL IN
Width
0.375 INCHES NOMINAL IN
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.
4320-01-423-343918-0113-01POSSIBLE MATCH
DEFLECTOR,DIRT AND LIQUID
Possible match (shared part number)Air & Liquid Systems Corporation Dba Buffalo Pumps
4320-01-423-4348NA1801POSSIBLE MATCH
PUMP,CENTRIFUGAL
Possible match (shared part number)Air & Liquid Systems Corporation Dba Buffalo Pumps
4320-01-423-43503-0188-03POSSIBLE MATCH
IMPELLER,PUMP,CENTRIFUGAL
Possible match (shared part number)Air & Liquid Systems Corporation Dba Buffalo Pumps
4320-01-423-442624-0059-01POSSIBLE MATCH
COVER,HYDRAULIC,PUMP-MOTOR
Possible match (shared part number)Air & Liquid Systems Corporation Dba Buffalo Pumps
4320-01-423-491724-0058-01POSSIBLE MATCH
COVER,HYDRAULIC,PUMP-MOTOR
Possible match (shared part number)Air & Liquid Systems Corporation Dba Buffalo Pumps
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
NA1627
D/9Drawing number reference only
U.S. Government activity
18-0112-01
3/2Design control — primary reference
U.S. Government activity
NA1801
D/9Drawing number reference only
U.S. Government activity
PL.8SCO-2 ITEM 18A
5/2Secondary reference
U.S. Government activity
Related Parts
4320-01-423-3439POSSIBLE MATCH
DEFLECTOR,DIRT AND LIQUID
18-0113-01
4320-01-423-4348POSSIBLE MATCH
PUMP,CENTRIFUGAL
NA1801
4320-01-423-4350POSSIBLE MATCH
IMPELLER,PUMP,CENTRIFUGAL
3-0188-03
4320-01-423-4426POSSIBLE MATCH
COVER,HYDRAULIC,PUMP-MOTOR
24-0059-01
4320-01-423-4917POSSIBLE MATCH
COVER,HYDRAULIC,PUMP-MOTOR
24-0058-01
Frequently Asked Questions
What is NSN 4320-01-423-3426?
NSN 4320-01-423-3426 is a Deflector,dirt and Liquid, classified under FSC 4320, Power and Hand Pumps. Status: active.
What NSN replaces 4320-01-423-3426?
5 possible matches (shared part number, not a government interchangeability claim): 4320-01-423-3439, 4320-01-423-4348, 4320-01-423-4350. Verify interchangeability with system specifications before substitution.
What are the specifications of 4320-01-423-3426?
Key specifications for 4320-01-423-3426: Outside Diameter: 5.250 INCHES NOMINAL IN; Inside Diameter: 3.189 INCHES NOMINAL IN; Special Features: MATERIAL PER ASTM B584,ALLOY 903; USED ON BUFFALO PUMP MODEL 8 SCO CENTRIFUGAL PUMP; Width: 0.375 INCHES NOMINAL IN. 4 specifications are documented in the U.S. Government catalog.
Is NSN 4320-01-423-3426 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.