Valve, Stop-Check4820-01-591-6424

NSN 4820-01-591-6424 · NIIN 015916424 · Part number M2056-3/MPL2676

Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 0ASY6

Government record, cited

NSN 4820-01-591-6424 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-591-6424. Manufacturer of record part number: M2056-3/MPL2676.

Also searched as 4820-01-591-6424 · 4820015916424 · NIIN 015916424 · 01-591-6424 · FSC 4820 Valves, Nonpowered · CAGE 0ASY6 · M2056-3/MPL2676 · M4031-2676

Nearby stock numbers ← 4820-01-591-6416 Cartridge, Stop-Check Valve · 4820-01-591-6650 Valve Assembly, Manifold →

4820-01-591-6424 — Valves, Nonpowered

Features

Valve,stop-Check — FSC 4820
1 manufacturer part number on file
Manufacturer of record: Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc

Identification

NSN: 4820-01-591-6424
NIIN: 015916424
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: M2056-3/MPL2676
Manufacturer: Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc

General Description

The Valve,stop-Check, cataloged under National Stock Number 4820-01-591-6424, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Catalog Facts

Item Name	Valve,stop-Check
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc (CAGE 0ASY6)

Technical Specifications

Parameter	Value
NSN	4820-01-591-6424
Primary Part Number	M2056-3/MPL2676
Item Name	Valve,stop-Check
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc
Status	ACTIVE

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

Cross-Reference Index

Part Number	Manufacturer
M2056-3/MPL2676 PRIMARY	Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc (USA)

Reference documents

Reference	Meaning
M2056-3/MPL2676	3/9 Design control — primary reference Derbyshire Machine & Tool Co
M4031-2676	D/9 Drawing number reference only Derbyshire Machine & Tool Co

Frequently Asked Questions

What is NSN 4820-01-591-6424?

NSN 4820-01-591-6424 is a Valve,stop-Check, manufactured by Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-591-6424?

NSN 4820-01-591-6424 has 1 manufacturer part number on file: M2056-3/MPL2676 (Derbyshire Marine Products, Llc Dba Derbyshire Marine Products Llc).

Is NSN 4820-01-591-6424 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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