The Piston,pump, cataloged under National Stock Number 4320-01-303-3887, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Piston,pump
FSC / FSG
4320 — Power and Hand Pumps (FSG 43)
Technical Specifications
Parameter
Value
NSN
4320-01-303-3887
Item Name
Piston,pump
FSC / FSG
4320 / 43 — Power and Hand Pumps
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
⇄Related Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3040-01-417-846621137-1000-1POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-418-954421137-1006-1POSSIBLE MATCH
PISTON,VALVE
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4810-01-419-050821137-001POSSIBLE MATCH
VALVE,LINEAR,DIRECTIONAL CONTROL
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4810-01-419-365021137-1007-1POSSIBLE MATCH
PISTON,VALVE
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-426-789221137-801-1POSSIBLE MATCH
CAP,VALVE
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4810-01-429-132720350-018POSSIBLE MATCH
VALVE,SOLENOID
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
6240-01-435-6019300/SBIF 120VPOSSIBLE MATCH
LAMP,INCANDESCENT
Possible match (shared part number)General Electric Co Wire and Cable Business Dept
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
21137
5/1Secondary reference
Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations
21137
3/2Design control — primary reference
U.S. Government activity
Related Parts
3040-01-417-8466POSSIBLE MATCH
SHAFT,SHOULDERED
21137-1000-1
4820-01-418-9544POSSIBLE MATCH
PISTON,VALVE
21137-1006-1
4810-01-419-0508POSSIBLE MATCH
VALVE,LINEAR,DIRECTIONAL CONTROL
21137-001
4810-01-419-3650POSSIBLE MATCH
PISTON,VALVE
21137-1007-1
4820-01-426-7892POSSIBLE MATCH
CAP,VALVE
21137-801-1
4810-01-429-1327POSSIBLE MATCH
VALVE,SOLENOID
20350-018
6240-01-435-6019POSSIBLE MATCH
LAMP,INCANDESCENT
300/SBIF 120V
Frequently Asked Questions
What is NSN 4320-01-303-3887?
NSN 4320-01-303-3887 is a Piston,pump, classified under FSC 4320, Power and Hand Pumps. Status: active.
What NSN replaces 4320-01-303-3887?
7 possible matches (shared part number, not a government interchangeability claim): 3040-01-417-8466, 4820-01-418-9544, 4810-01-419-0508. Verify interchangeability with system specifications before substitution.
Is NSN 4320-01-303-3887 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.