Diaphragm, Valve, Flat4820-01-031-9622

NSN 4820-01-031-9622 · NIIN 010319622

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-031-9622 · 4820010319622 · NIIN 010319622 · 01-031-9622 · FSC 4820 Valves, Nonpowered

Nearby stock numbers ← 4820-01-031-9542 Seat, Valve · 4820-01-031-9712 →

4820-01-031-9622 — Valves, Nonpowered

Features

Diaphragm,valve,flat — FSC 4820
Outside Diameter: 1.805 INCHES NOMINAL IN
Style Designator: FLAT
Material Thickness: 0.025 INCHES NOMINAL IN
Bolt Hole Quantity: 2
Bolt Circle Diameter: 1.545 INCHES NOMINAL IN
Center Hole Diameter: 0.188 INCHES NOMINAL IN
Material: RUBBER

Identification

NSN: 4820-01-031-9622
NIIN: 010319622
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-031-9622, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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	4820-01-031-9622
Item Name	Diaphragm,valve,flat
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Outside Diameter	1.805 INCHES NOMINAL IN
Style Designator	FLAT
Material Thickness	0.025 INCHES NOMINAL IN
Bolt Hole Quantity	2
Bolt Circle Diameter	1.545 INCHES NOMINAL IN
Center Hole Diameter	0.188 INCHES NOMINAL IN
Material	RUBBER
Hole Diameter	0.090 INCHES NOMINAL IN

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.

6640-01-626-0386L12001 POSSIBLE MATCH

SLIDE,MICROSCOPE

Possible match (shared part number)Logos Biosystems, Inc. Dba Logos Biosystems Inc

Cross-Reference Index

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

Reference documents

Reference	Meaning
L12-001	3/2 Design control — primary reference U.S. Government activity

Related Parts

6640-01-626-0386POSSIBLE MATCH

SLIDE,MICROSCOPE

L12001

Frequently Asked Questions

What is NSN 4820-01-031-9622?

NSN 4820-01-031-9622 is a Diaphragm,valve,flat, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-031-9622?

1 possible match (shared part number, not a government interchangeability claim): 6640-01-626-0386. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-01-031-9622?

Key specifications for 4820-01-031-9622: Outside Diameter: 1.805 INCHES NOMINAL IN; Style Designator: FLAT; Material Thickness: 0.025 INCHES NOMINAL IN; Bolt Hole Quantity: 2. 8 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-031-9622 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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