Diaphragm, Valve, Flat4820-01-337-0256

NSN 4820-01-337-0256 · NIIN 013370256 · Part number 6206921

Naval Sea Systems Command · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 53711

Government record, cited

NSN 4820-01-337-0256 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-337-0256. Manufacturer of record part number: 6206921.

Also searched as 4820-01-337-0256 · 4820013370256 · NIIN 013370256 · 01-337-0256 · FSC 4820 Valves, Nonpowered · CAGE 53711 · 6206921

Nearby stock numbers ← 4820-01-337-0071 Seat, Valve · 4820-01-337-0271 Cap, Valve →

4820-01-337-0256 — Valves, Nonpowered

Features

Diaphragm,valve,flat — FSC 4820
Outside Diameter: 0.755 INCHES NOMINAL IN
Material: PLASTIC, POLYETHYLENE (PP)
1 manufacturer part number on file
Manufacturer of record: Naval Sea Systems Command

Identification

NSN: 4820-01-337-0256
NIIN: 013370256
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 6206921
Manufacturer: Naval Sea Systems Command

General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-337-0256, 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 2 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. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-337-0256
Primary Part Number	6206921
Item Name	Diaphragm,valve,flat
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Naval Sea Systems Command
Status	ACTIVE
Outside Diameter	0.755 INCHES NOMINAL IN
Material	PLASTIC, POLYETHYLENE (PP)

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
6206921 PRIMARY	Naval Sea Systems Command (USA)

No interchangeability data on file.

Other items in FSC 4820 — Valves, Nonpowered

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

4820-00-000-0097

4820-00-000-0097 · Item name not on file

4820-00-001-0010

VALVE,ROTARY,SELECTOR

4820-00-001-0020

4820-00-001-0020 · Item name not on file

4820-00-001-0021

4820-00-001-0021 · Item name not on file

4820-00-001-0032

4820-00-001-0032 · Item name not on file

4820-00-001-0037

VALVE,SAFETY RELIEF

4820-00-001-0042

4820-00-001-0042 · Item name not on file

4820-00-001-1230

4820-00-001-1230 · Item name not on file

Frequently Asked Questions

What is NSN 4820-01-337-0256?

NSN 4820-01-337-0256 is a Diaphragm,valve,flat, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-337-0256?

NSN 4820-01-337-0256 has 1 manufacturer part number on file: 6206921 (Naval Sea Systems Command).

What are the specifications of 6206921?

Key specifications for 6206921: Outside Diameter: 0.755 INCHES NOMINAL IN; Material: PLASTIC, POLYETHYLENE (PP). 2 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-337-0256 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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