The Piston,valve, cataloged under National Stock Number 4810-01-478-7420, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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,valve
FSC / FSG
4810 — Valves, Powered (FSG 48)
Technical Specifications
Parameter
Value
NSN
4810-01-478-7420
Item Name
Piston,valve
FSC / FSG
4810 / 48 — Valves, Powered
Status
ACTIVE
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 Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3040-01-478-7483198281-0001POSSIBLE MATCH
GUIDE,PISTON ROD
Possible match (shared part number)Marotta Controls Inc
4820-01-478-9338198590-0087POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Marotta Controls Inc
4820-01-478-9533284591-0001 ITEM 16POSSIBLE MATCH
CAGE,VALVE
Possible match (shared part number)Marotta Controls Inc
5330-01-479-0863108241-1530POSSIBLE MATCH
RETAINER,PACKING
Possible match (shared part number)Marotta Controls Inc
5330-01-479-0872133552-0009POSSIBLE MATCH
RETAINER,PACKING
Possible match (shared part number)Marotta Controls Inc
4820-01-545-4087POSSIBLE MATCH
VALVE ASSEMBLY
Possible match (shared part number)
4820-01-695-0219POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
284591-0001 ITEM 17
5/2Secondary reference
U.S. Government activity
284591-0001
D/9Drawing number reference only
U.S. Government activity
198282-0122
3/2Design control — primary reference
U.S. Government activity
Related Parts
3040-01-478-7483POSSIBLE MATCH
GUIDE,PISTON ROD
198281-0001
4820-01-478-9338POSSIBLE MATCH
SEAT,VALVE
198590-0087
4820-01-478-9533POSSIBLE MATCH
CAGE,VALVE
284591-0001 ITEM 16
5330-01-479-0863POSSIBLE MATCH
RETAINER,PACKING
108241-1530
5330-01-479-0872POSSIBLE MATCH
RETAINER,PACKING
133552-0009
4820-01-545-4087POSSIBLE MATCH
VALVE ASSEMBLY
4820-01-695-0219POSSIBLE MATCH
DISK,VALVE
Frequently Asked Questions
What is NSN 4810-01-478-7420?
NSN 4810-01-478-7420 is a Piston,valve, classified under FSC 4810, Valves, Powered. Status: active.
What NSN replaces 4810-01-478-7420?
7 possible matches (shared part number, not a government interchangeability claim): 3040-01-478-7483, 4820-01-478-9338, 4820-01-478-9533. Verify interchangeability with system specifications before substitution.
Is NSN 4810-01-478-7420 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.