NSN 4820-01-048-4490 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-048-4490. Manufacturer of record part number: 803-2177518-08XX-03.
Pressure Rating: 900.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
Style Designator: SPLIT WEDGE
Seat Angle: 30.0 DEGREES NOMINAL
Media for Which Designed: STEAM OR WATER
Material: STEEL
2 manufacturer part numbers on file
Manufacturer of record: Naval Sea Systems Command
Identification
NSN: 4820-01-048-4490
NIIN: 010484490
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 803-2177518-08XX-03
Manufacturer: Naval Sea Systems Command
General Description
The Disk,valve, cataloged under National Stock Number 4820-01-048-4490, 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 5 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-048-4490
Primary Part Number
803-2177518-08XX-03
Item Name
Disk,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Pressure Rating
900.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
Style Designator
SPLIT WEDGE
Seat Angle
30.0 DEGREES NOMINAL
Media for Which Designed
STEAM OR WATER
Material
STEEL
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.
4820-01-113-4204810-2177518-05XX-41POSSIBLE MATCH
HASP,LOCKING
Possible match (shared part number)Naval Ship Systems Command
4820-01-113-5326803-2177518-05XX-21POSSIBLE MATCH
YOKE CLAMP RING
Possible match (shared part number)Naval Ship Systems Command
4820-01-113-5327810-2177518-05XX-17POSSIBLE MATCH
RING,BONNET RETAINING
Possible match (shared part number)Naval Ship Systems Command
4820-01-118-4434810-2177518-05XX-91POSSIBLE MATCH
GUIDE,VALVE DISK CARRIER
Possible match (shared part number)Naval Ship Systems Command
4820-01-127-6171803-2177518-05XX-12POSSIBLE MATCH
RETAINER,DISK,VALVE
Possible match (shared part number)Naval Ship Systems Command
4820-01-348-2976845-6351965PC3POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)Naval Sea Systems Command
NSN 4820-01-048-4490 is a Disk,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-048-4490?
NSN 4820-01-048-4490 has 2 manufacturer part numbers on file: 803-2177518-08XX-03 (Naval Sea Systems Command), 810-2177518-08XX-03 (Naval Sea Systems Command).
What NSN replaces 4820-01-048-4490?
7 possible matches (shared part number, not a government interchangeability claim): 4820-01-113-4204, 4820-01-113-5326, 4820-01-113-5327. Verify interchangeability with system specifications before substitution.
What are the specifications of 803-2177518-08XX-03?
Key specifications for 803-2177518-08XX-03: Overall Height: 8.438 INCHES NOMINAL IN; Pressure Rating: 900.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Style Designator: SPLIT WEDGE; Seat Angle: 30.0 DEGREES NOMINAL. 5 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-048-4490 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.