NSN 4820-01-474-3308 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-474-3308. Manufacturer of record part number: 556-7108811 PART 13.
Also searched as4820-01-474-3308 ·
4820014743308 ·
NIIN 014743308 ·
01-474-3308 ·
FSC 4820 Valves, Nonpowered · CAGE 53711 · 556-7108811 PART 13 · 7108811
Material Document and Classification: NYLATRON GSVQ MFR REF SINGLE MATERIAL RESPONSE OVERALL
Material: PLASTIC BODY
1 manufacturer part number on file
Manufacturer of record: Naval Sea Systems Command
Identification
NSN: 4820-01-474-3308
NIIN: 014743308
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 556-7108811 PART 13
Manufacturer: Naval Sea Systems Command
General Description
The Seat,valve, cataloged under National Stock Number 4820-01-474-3308, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-474-3308
Primary Part Number
556-7108811 PART 13
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Seal Accommodation Type
GROOVED
Material Document and Classification
NYLATRON GSVQ MFR REF SINGLE MATERIAL RESPONSE OVERALL
Material
PLASTIC BODY
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.
4820-01-474-3312556-7108811 PART 12POSSIBLE MATCH
BALL,VALVE,PORTED
Possible match (shared part number)Naval Sea Systems Command
4820-01-474-3316556-7108811 PART 9POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
4730-01-537-6062556-7108811 ASSY BPPOSSIBLE MATCH
MANIFOLD ASSEMBLY,HYDRAULIC
Possible match (shared part number)Naval Sea Systems Command
4730-01-537-6078556-7108811 ASSY APPOSSIBLE MATCH
MANIFOLD ASSEMBLY,HYDRAULIC
Possible match (shared part number)Naval Sea Systems Command
4730-01-540-7887556-7108811 ASSY CPPOSSIBLE MATCH
MANIFOLD ASSEMBLY,HYDRAULIC
Possible match (shared part number)Naval Sea Systems Command
NSN 4820-01-474-3308 is a Seat,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-474-3308?
NSN 4820-01-474-3308 has 1 manufacturer part number on file: 556-7108811 PART 13 (Naval Sea Systems Command).
What NSN replaces 4820-01-474-3308?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-474-3312, 4820-01-474-3316, 4730-01-537-6062. Verify interchangeability with system specifications before substitution.
What are the specifications of 556-7108811 PART 13?
Key specifications for 556-7108811 PART 13: Seal Accommodation Type: GROOVED; Material Document and Classification: NYLATRON GSVQ MFR REF SINGLE MATERIAL RESPONSE OVERALL; Special Features: SEAT IS 1.000 INCH THICK; HAS 2 GROOVES 180 DEGREES APART; GOES ON A .25 X .50 3 PORT 2 POSITION VALVE ASSEMBLY IN; End Item Identification: NHA HYDRAULIC MANIFOLD ASSEMBLY; TORP TUBE; NSSN CLASS SUBMARINE. 3 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-474-3308 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.