PartsTable TECHNICAL DATA SHEET

NSN 4820-01-679-8732Government record, cited

Valve, Check4820-01-679-8732

NSN 4820-01-679-8732 · NIIN 016798732 · Part number HS4550-12A

Mcdonnell Douglas Helicopter Co Inc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 02731

Government record, cited

NSN 4820-01-679-8732 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-679-8732. Manufacturer of record part number: HS4550-12A.

Also searched as 4820-01-679-8732 · 4820016798732 · NIIN 016798732 · 01-679-8732 · FSC 4820 Valves, Nonpowered · CAGE 02731 · HS4550-12A

Nearby stock numbers ← 4820-01-679-8705 Coupling, Actuator-Handwheel, Valv · 4820-01-679-8754 Gear Operator, Valve →

4820-01-679-8732 — Valves, Nonpowered

Features

Valve,check — FSC 4820
1 manufacturer part number on file
Manufacturer of record: Mcdonnell Douglas Helicopter Co Inc

Identification

NSN: 4820-01-679-8732
NIIN: 016798732
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: HS4550-12A
Manufacturer: Mcdonnell Douglas Helicopter Co Inc

General Description

The Valve,check, cataloged under National Stock Number 4820-01-679-8732, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mcdonnell Douglas Helicopter Co Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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	Mcdonnell Douglas Helicopter Co Inc (CAGE 02731)

Technical Specifications

Parameter	Value
NSN	4820-01-679-8732
Primary Part Number	HS4550-12A
Item Name	Valve,check
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Mcdonnell Douglas Helicopter Co 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
HS4550-12A PRIMARY	Mcdonnell Douglas Helicopter Co Inc (USA)

Reference documents

Reference	Meaning
HS4550-12A	5/9 Secondary reference The Boeing Company
HS4550-12A	5/2 Secondary reference U.S. Government activity

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 4820-01-679-8732?

NSN 4820-01-679-8732 is a Valve,check, manufactured by Mcdonnell Douglas Helicopter Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-679-8732?

NSN 4820-01-679-8732 has 1 manufacturer part number on file: HS4550-12A (Mcdonnell Douglas Helicopter Co Inc).

Is NSN 4820-01-679-8732 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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