PartsTable TECHNICAL DATA SHEET

NSN 4820-01-221-2076Government record, cited

Seat, Valve4820-01-221-2076

NSN 4820-01-221-2076 · NIIN 012212076

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-221-2076 · 4820012212076 · NIIN 012212076 · 01-221-2076 · FSC 4820 Valves, Nonpowered · F05431 · F05431 ITEM 13 4IN

Nearby stock numbers ← 4820-01-221-2075 · 4820-01-221-2082 Valve, Regulating, Fluid Pressure →

4820-01-221-2076 — Valves, Nonpowered

Features

Seat,valve — FSC 4820

Identification

NSN: 4820-01-221-2076
NIIN: 012212076
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-221-2076, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Catalog Facts

Item Name	Seat,valve
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)

Technical Specifications

Parameter	Value
NSN	4820-01-221-2076
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
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

⇄ Related Items 3

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

4820-01-221-5518F05431 4IN AND CD-2286-1 POSSIBLE MATCH

VALVE,GATE

Possible match (shared part number)Flowserve Corporation Div Flowserve Us Inc

4820-01-221-5672F05431 ITEM 5 4IN POSSIBLE MATCH

STEM,FLUID VALVE

Possible match (shared part number)Flowserve Corporation Div Flowserve Us Inc

4820-01-222-0425F05431 ITEM 4 4IN POSSIBLE MATCH

DISK,VALVE

Possible match (shared part number)Flowserve Corporation Div Flowserve Us Inc

Cross-Reference Index

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

Reference documents

Reference	Meaning
F05431	D/9 Drawing number reference only U.S. Government activity
F05431 ITEM 13 4IN	3/2 Design control — primary reference U.S. Government activity

Related Parts

4820-01-221-5518POSSIBLE MATCH

VALVE,GATE

F05431 4IN AND CD-2286-1

4820-01-221-5672POSSIBLE MATCH

STEM,FLUID VALVE

F05431 ITEM 5 4IN

4820-01-222-0425POSSIBLE MATCH

DISK,VALVE

F05431 ITEM 4 4IN

Frequently Asked Questions

What is NSN 4820-01-221-2076?

NSN 4820-01-221-2076 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-221-2076?

3 possible matches (shared part number, not a government interchangeability claim): 4820-01-221-5518, 4820-01-221-5672, 4820-01-222-0425. Verify interchangeability with system specifications before substitution.

Is NSN 4820-01-221-2076 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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