The Cap,valve, cataloged under National Stock Number 4820-01-103-3385, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-103-3385
Item Name
Cap,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Outside Diameter
6.750 INCHES NOMINAL IN
Valve Size for Which Designed
8.000 INCHES IN
Material
COPPER ALLOY
Attachment Method
THREADED
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.
4820-01-103-3436810-4385049-X-037POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)Naval Ship Systems Command
4820-01-111-5698803-4385049-X-095POSSIBLE MATCH
RETAINER,DOWEL
Possible match (shared part number)Naval Ship Systems Command
4810-01-113-3738810-4385049-B-054POSSIBLE MATCH
CRANKSHAFT,VALVE
Possible match (shared part number)Naval Ship Systems Command
4810-01-113-4202810-4385049-B-020POSSIBLE MATCH
LINK,ADJUSTING
Possible match (shared part number)Naval Ship Systems Command
4810-01-113-5381810-4385049-X-048POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Ship Systems Command
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
810-4385049 PIECE 12
5/9Secondary reference
U.S. Government activity
810-4385049-X-012
3/2Design control — primary reference
U.S. Government activity
810-4385049
D/9Drawing number reference only
U.S. Government activity
Related Parts
4820-01-103-3436POSSIBLE MATCH
DISK,VALVE
810-4385049-X-037
4820-01-111-5698POSSIBLE MATCH
RETAINER,DOWEL
803-4385049-X-095
4810-01-113-3738POSSIBLE MATCH
CRANKSHAFT,VALVE
810-4385049-B-054
4810-01-113-4202POSSIBLE MATCH
LINK,ADJUSTING
810-4385049-B-020
4810-01-113-5381POSSIBLE MATCH
STEM,FLUID VALVE
810-4385049-X-048
Frequently Asked Questions
What is NSN 4820-01-103-3385?
NSN 4820-01-103-3385 is a Cap,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-103-3385?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-103-3436, 4820-01-111-5698, 4810-01-113-3738. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-103-3385?
Key specifications for 4820-01-103-3385: Overall Length: 1.625 INCHES NOMINAL IN; Outside Diameter: 6.750 INCHES NOMINAL IN; Valve Size for Which Designed: 8.000 INCHES IN; Material: COPPER ALLOY. 4 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-103-3385 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.