Diaphragm, Valve, Flat4820-01-012-2187

NSN 4820-01-012-2187 · NIIN 010122187

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-012-2187 · 4820010122187 · NIIN 010122187 · 01-012-2187 · FSC 4820 Valves, Nonpowered · 31747 · P37-433-1 PIECE 22

Nearby stock numbers ← 4820-01-012-2146 Valve, Globe · 4820-01-012-2800 →

4820-01-012-2187 — Valves, Nonpowered

Features

Diaphragm,valve,flat — FSC 4820
Outside Diameter: 3.875 INCHES NOMINAL IN
Style Designator: FLAT
Material Thickness: 0.080 INCHES NOMINAL IN
Center Hole Diameter: 0.400 INCHES NOMINAL IN
Material: RUBBER CHLOROPRENE CLASS CR

Identification

NSN: 4820-01-012-2187
NIIN: 010122187
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-012-2187, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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	4820-01-012-2187
Item Name	Diaphragm,valve,flat
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Outside Diameter	3.875 INCHES NOMINAL IN
Style Designator	FLAT
Material Thickness	0.080 INCHES NOMINAL IN
Center Hole Diameter	0.400 INCHES NOMINAL IN
Material	RUBBER CHLOROPRENE CLASS CR

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 1

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

5910-01-447-2047 POSSIBLE MATCH

CAPACITOR,FIXED,CERAMIC DIELECTR

Possible match (shared part number)

Cross-Reference Index

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

Reference documents

Reference	Meaning
31747	3/2 Design control — primary reference U.S. Government activity
P37-433-1 PIECE 22	5/2 Secondary reference U.S. Government activity

Related Parts

5910-01-447-2047POSSIBLE MATCH

CAPACITOR,FIXED,CERAMIC DIELECTR

Frequently Asked Questions

What is NSN 4820-01-012-2187?

NSN 4820-01-012-2187 is a Diaphragm,valve,flat, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-012-2187?

1 possible match (shared part number, not a government interchangeability claim): 5910-01-447-2047. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-01-012-2187?

Key specifications for 4820-01-012-2187: Outside Diameter: 3.875 INCHES NOMINAL IN; Style Designator: FLAT; Material Thickness: 0.080 INCHES NOMINAL IN; Center Hole Diameter: 0.400 INCHES NOMINAL IN. 5 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-012-2187 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.

PartsTable Design LLC · partstable.com