NSN 4820-01-419-3630 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-419-3630. Manufacturer of record part number: 556-6406596-MFBC-A16.
The Stem,fluid Valve, cataloged under National Stock Number 4820-01-419-3630, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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.
Technical Specifications
Parameter
Value
NSN
4820-01-419-3630
Primary Part Number
556-6406596-MFBC-A16
Item Name
Stem,fluid Valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Valve Type for Which Designed
BALL
Largest Outside Diameter
1.864 INCHES NOMINAL IN
Material
ALUMINUM 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 Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-419-3666556-6406596-MFBC-12/A14POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-419-3667556-6406596-MFBC-A14POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-419-3668556-6406596-MFBC-A13/A15POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-419-3671556-6406596-MFBC-A15POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-419-6363556-6406596-MFBC-A17POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
5970-01-420-3385556-6406596-MFBC-A24POSSIBLE MATCH
INSULATOR,WASHER
Possible match (shared part number)Naval Sea Systems Command
5970-01-421-7251556-6406596-MFBC-A25POSSIBLE MATCH
INSULATOR,WASHER
Possible match (shared part number)Naval Sea Systems Command
Huntington Ingalls Inc Div Newport News Shipbuilding
C791-5601
D/9Drawing number reference only
U.S. Government activity
6406596
D/9Drawing number reference only
Naval Sea Systems Command
C791-5601-MFBC-A16
5/2Secondary reference
U.S. Government activity
Related Parts
4820-01-419-3666POSSIBLE MATCH
PARTS KIT,BALL VALVE
556-6406596-MFBC-12/A14
4820-01-419-3667POSSIBLE MATCH
SEAT,VALVE
556-6406596-MFBC-A14
4820-01-419-3668POSSIBLE MATCH
PARTS KIT,BALL VALVE
556-6406596-MFBC-A13/A15
4820-01-419-3671POSSIBLE MATCH
SEAT,VALVE
556-6406596-MFBC-A15
4820-01-419-6363POSSIBLE MATCH
STEM,FLUID VALVE
556-6406596-MFBC-A17
5970-01-420-3385POSSIBLE MATCH
INSULATOR,WASHER
556-6406596-MFBC-A24
5970-01-421-7251POSSIBLE MATCH
INSULATOR,WASHER
556-6406596-MFBC-A25
Frequently Asked Questions
What is NSN 4820-01-419-3630?
NSN 4820-01-419-3630 is a Stem,fluid Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-419-3630?
NSN 4820-01-419-3630 has 3 manufacturer part numbers on file: 556-6406596-MFBC-B16 (Naval Sea Systems Command), 556-6406596-MFBC-A16 (Naval Sea Systems Command), 218013561 (Naval Sea Systems Command).
What NSN replaces 4820-01-419-3630?
7 possible matches (shared part number, not a government interchangeability claim): 4820-01-419-3666, 4820-01-419-3667, 4820-01-419-3668. Verify interchangeability with system specifications before substitution.
What are the specifications of 556-6406596-MFBC-A16?
Key specifications for 556-6406596-MFBC-A16: Valve Type for Which Designed: BALL; Largest Outside Diameter: 1.864 INCHES NOMINAL IN; Overall Length: 5.580 INCHES NOMINAL IN; End Item Identification: SHIP,OHIO CLASS SSN; HP-159 AND HS-159 MANIFOLD. 3 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-419-3630 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.