NSN 4820-01-458-3801 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-458-3801. Manufacturer of record part number: 845-7069815-21-037.
Outside Diameter: 0.437 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
Material Document and Classification: ASTM B348 ASSN STD SINGLE MATERIAL RESPONSE
Valve Size for Which Designed: 0.500 INCHES IN
Inside Diameter: 0.219 INCHES MINIMUM AND 0.222 INCHES MAXIMUM IN
Valve Design Control Activity: 53711
1 manufacturer part number on file
Manufacturer of record: Naval Sea Systems Command
Identification
NSN: 4820-01-458-3801
NIIN: 014583801
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 845-7069815-21-037
Manufacturer: Naval Sea Systems Command
General Description
The Retainer,seat,valve, cataloged under National Stock Number 4820-01-458-3801, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-458-3801
Primary Part Number
845-7069815-21-037
Item Name
Retainer,seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Outside Diameter
0.437 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
Material Document and Classification
ASTM B348 ASSN STD SINGLE MATERIAL RESPONSE
Valve Size for Which Designed
0.500 INCHES IN
Inside Diameter
0.219 INCHES MINIMUM AND 0.222 INCHES MAXIMUM IN
Valve Design Control Activity
53711
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.
4820-01-458-3803845-7069815-11-036POSSIBLE 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 4820-01-458-3801 is a Retainer,seat,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-458-3801?
NSN 4820-01-458-3801 has 1 manufacturer part number on file: 845-7069815-21-037 (Naval Sea Systems Command).
What NSN replaces 4820-01-458-3801?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-458-3803, 4820-01-460-8426, 4820-01-479-2688. Verify interchangeability with system specifications before substitution.
What are the specifications of 845-7069815-21-037?
Key specifications for 845-7069815-21-037: Outside Diameter: 0.437 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN; Material Document and Classification: ASTM B348 ASSN STD SINGLE MATERIAL RESPONSE; Overall Length: 0.438 INCHES NOMINAL IN; Valve Size for Which Designed: 0.500 INCHES IN. 5 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-458-3801 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.