PartsTable TECHNICAL DATA SHEET

NSN 4820-01-677-9665Government record, cited

Valve, Check4820-01-677-9665

NSN 4820-01-677-9665 · NIIN 016779665 · Part number AA5990

Itw Gse Inc. · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 0SMN2

Government record, cited

NSN 4820-01-677-9665 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-677-9665. Manufacturer of record part number: AA5990.

Also searched as 4820-01-677-9665 · 4820016779665 · NIIN 016779665 · 01-677-9665 · FSC 4820 Valves, Nonpowered · CAGE 0SMN2 · AA5990

Nearby stock numbers ← 4820-01-677-9534 Valve, Ball · 4820-01-677-9681 Gear Operator, Valve →

4820-01-677-9665 — Valves, Nonpowered

Features

Valve,check — FSC 4820
2 manufacturer part numbers on file
Manufacturer of record: Itw Gse Inc.

Identification

NSN: 4820-01-677-9665
NIIN: 016779665
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: AA5990
Manufacturer: Itw Gse Inc.

General Description

The Valve,check, cataloged under National Stock Number 4820-01-677-9665, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Itw Gse Inc.. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Catalog Facts

Item Name	Valve,check
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	J C Aviation International Pty Ltd (CAGE Z0FP9); Itw Gse Inc. (CAGE 0SMN2)

Technical Specifications

Parameter	Value
NSN	4820-01-677-9665
Primary Part Number	AA5990
Item Name	Valve,check
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Itw Gse Inc.
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
AA5990	J C Aviation International Pty Ltd (AUS)
AA5990 PRIMARY	Itw Gse Inc. (USA)

Reference documents

Reference	Meaning
AA5990	5/9 Secondary reference Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems

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 4820-01-677-9665?

NSN 4820-01-677-9665 is a Valve,check, manufactured by Itw Gse Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-677-9665?

NSN 4820-01-677-9665 has 2 manufacturer part numbers on file: AA5990 (J C Aviation International Pty Ltd), AA5990 (Itw Gse Inc.).

Is NSN 4820-01-677-9665 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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