PartsTable TECHNICAL DATA SHEET

NSN 4820-01-421-6346Government record, cited

Cartridge, Check Valve4820-01-421-6346

NSN 4820-01-421-6346 · NIIN 014216346

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-421-6346 · 4820014216346 · NIIN 014216346 · 01-421-6346 · FSC 4820 Valves, Nonpowered · 114395CD · PLC-11440

Nearby stock numbers ← 4820-01-421-6345 Cartridge, Check Valve · 4820-01-421-6350 Cartridge, Check Valve →

4820-01-421-6346 — Valves, Nonpowered

Features

Cartridge,check Valve — FSC 4820
Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Valve Size: 1.000 INCHES IN
Material: STEEL CORROSION RESISTING

Identification

NSN: 4820-01-421-6346
NIIN: 014216346
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Cartridge,check Valve, cataloged under National Stock Number 4820-01-421-6346, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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	4820-01-421-6346
Item Name	Cartridge,check Valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Operating Pressure	3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Valve Size	1.000 INCHES IN
Material	STEEL CORROSION RESISTING

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 Items 8

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

4820-01-421-6350114399CD POSSIBLE MATCH

CARTRIDGE,CHECK VALVE

Possible match (shared part number)Admiral Valve Llc Dba Cpv Manufacturing

4730-01-421-6833 POSSIBLE MATCH

NUT,UNION

Possible match (shared part number)

4820-01-422-5734PLC-11440-40 POSSIBLE MATCH

VALVE,CHECK

Possible match (shared part number)Admiral Valve Llc Dba Cpv Manufacturing

4730-01-422-7256 POSSIBLE MATCH

NUT,UNION

Possible match (shared part number)

4730-01-422-9570 POSSIBLE MATCH

NUT,UNION

Possible match (shared part number)

4820-01-422-9581 POSSIBLE MATCH

VALVE,CHECK

Possible match (shared part number)

4820-01-422-9586PLC-11440-08 POSSIBLE MATCH

VALVE,CHECK

Possible match (shared part number)Admiral Valve Llc Dba Cpv Manufacturing

4820-01-423-1958114393CD POSSIBLE MATCH

GUIDE,VALVE STEM

Possible match (shared part number)Admiral Valve Llc Dba Cpv Manufacturing

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
114395CD	3/2 Design control — primary reference U.S. Government activity
PLC-11440	D/9 Drawing number reference only U.S. Government activity

Related Parts

4820-01-421-6350POSSIBLE MATCH

CARTRIDGE,CHECK VALVE

114399CD

4730-01-421-6833POSSIBLE MATCH

NUT,UNION

4820-01-422-5734POSSIBLE MATCH

VALVE,CHECK

PLC-11440-40

4730-01-422-7256POSSIBLE MATCH

NUT,UNION

4730-01-422-9570POSSIBLE MATCH

NUT,UNION

4820-01-422-9581POSSIBLE MATCH

VALVE,CHECK

4820-01-422-9586POSSIBLE MATCH

VALVE,CHECK

PLC-11440-08

4820-01-423-1958POSSIBLE MATCH

GUIDE,VALVE STEM

114393CD

Frequently Asked Questions

What is NSN 4820-01-421-6346?

NSN 4820-01-421-6346 is a Cartridge,check Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-421-6346?

8 possible matches (shared part number, not a government interchangeability claim): 4820-01-421-6350, 4730-01-421-6833, 4820-01-422-5734. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-01-421-6346?

Key specifications for 4820-01-421-6346: Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS; Valve Size: 1.000 INCHES IN; End Item Identification: SEAWOLF CLASS SSN; Material: STEEL CORROSION RESISTING. 3 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-421-6346 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.

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