NSN 4820-01-458-3798 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-458-3798. Manufacturer of record part number: 845-7069815-11-017.
Flange Seat to Disk End Height: 0.122 INCHES NOMINAL IN
Flange Diameter: 0.930 INCHES NOMINAL IN
Thread Length: 0.078 INCHES MINIMUM AND 0.095 INCHES MAXIMUM SINGLE THREADED PORTION IN
Style Designator: FAUCET
Material Document and Classification: MIL-T-9047 6AL-4V MIL SPEC SINGLE MATERIAL RESPONSE OVERALL V
Body Inside Diameter: 0.471 INCHES NOMINAL IN
Nominal Thread Size: 0.750 INCHES SINGLE THREADED PORTION IN
Identification
NSN: 4820-01-458-3798
NIIN: 014583798
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 845-7069815-11-017
Manufacturer: Naval Sea Systems Command
General Description
The Seat,valve, cataloged under National Stock Number 4820-01-458-3798, 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 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-458-3798
Primary Part Number
845-7069815-11-017
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Flange Seat to Disk End Height
0.122 INCHES NOMINAL IN
Flange Diameter
0.930 INCHES NOMINAL IN
Thread Length
0.078 INCHES MINIMUM AND 0.095 INCHES MAXIMUM SINGLE THREADED PORTION IN
Style Designator
FAUCET
Material Document and Classification
MIL-T-9047 6AL-4V MIL SPEC SINGLE MATERIAL RESPONSE OVERALL V
Body Inside Diameter
0.471 INCHES NOMINAL IN
Nominal Thread Size
0.750 INCHES SINGLE THREADED PORTION IN
Surface Treatment
ANODIZE OVERALL
Under Flange Height
0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN
Thread Class
3A SINGLE THREADED PORTION A
Thread Quantity Per Inch
15 SINGLE THREADED PORTION
Material
TITANIUM ALLOY OVERALL
Seating Surface Shape
FLAT
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.
4820-01-458-3799845-769815-21-018POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-458-3801845-7069815-21-037POSSIBLE MATCH
RETAINER,SEAT,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-458-3803845-7069815-11-036POSSIBLE MATCH
RETAINER,SEAT,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-460-8426845-7069815-X1-031,034,036,038POSSIBLE MATCH
DISC ASSY
Possible match (shared part number)Naval Sea Systems Command
4820-01-479-2688845-7069815-11-080POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-479-3341845-7069815-11-004POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-479-3345845-7069815-X1-002POSSIBLE MATCH
CAP,VALVE
Possible match (shared part number)Naval Sea Systems Command
NSN 4820-01-458-3798 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 4820-01-458-3798?
NSN 4820-01-458-3798 has 1 manufacturer part number on file: 845-7069815-11-017 (Naval Sea Systems Command).
What NSN replaces 4820-01-458-3798?
7 possible matches (shared part number, not a government interchangeability claim): 4820-01-458-3799, 4820-01-458-3801, 4820-01-458-3803. Verify interchangeability with system specifications before substitution.
What are the specifications of 845-7069815-11-017?
Key specifications for 845-7069815-11-017: Flange Seat to Disk End Height: 0.122 INCHES NOMINAL IN; Flange Diameter: 0.930 INCHES NOMINAL IN; Thread Length: 0.078 INCHES MINIMUM AND 0.095 INCHES MAXIMUM SINGLE THREADED PORTION IN; Style Designator: FAUCET. 13 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-458-3798 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.