NSN 4820-01-200-2219 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-200-2219. Manufacturer of record part number: SR-25S203-A.
The Seat,valve, cataloged under National Stock Number 4820-01-200-2219, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Singer Valve Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-200-2219
Primary Part Number
SR-25S203-A
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Singer Valve Inc
Status
ACTIVE
Material
STEEL SEAT
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 Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-200-2262Z0002APOSSIBLE MATCH
PUSH ROD,VALVE
Possible match (shared part number)Singer Valve Inc
4820-01-200-2263A3312POSSIBLE MATCH
LINER,VALVE
Possible match (shared part number)Singer Valve Inc
4820-01-200-2386ES-25620-APOSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Singer Valve Inc
4820-01-200-2387P-25R620-APOSSIBLE MATCH
PISTON,VALVE
Possible match (shared part number)Singer Valve Inc
4820-01-200-2388MY-25620R-APOSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Singer Valve Inc
NSN 4820-01-200-2219 is a Seat,valve, manufactured by Singer Valve Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-200-2219?
NSN 4820-01-200-2219 has 2 manufacturer part numbers on file: C5013 PIECE 4 (Singer Valve Inc), SR-25S203-A (Singer Valve Inc).
What NSN replaces 4820-01-200-2219?
6 possible matches (shared part number, not a government interchangeability claim): 4820-01-200-2262, 4820-01-200-2263, 4820-01-200-2386. Verify interchangeability with system specifications before substitution.
What are the specifications of SR-25S203-A?
Key specifications for SR-25S203-A: Material: STEEL SEAT. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-200-2219 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.