PartsTable TECHNICAL DATA SHEET

NSN 1620-01-419-7919Government record, cited

Ring, Expander1620-01-419-7919

NSN 1620-01-419-7919 · NIIN 014197919 · Part number S4445080-64

Trelleborg Sealing Solutions Us, Inc. · FSC 1620 — Aircraft Landing Gear Components · FSG 16 — Aircraft Components and Accessories · CAGE 09257

Government record, cited

NSN 1620-01-419-7919 — this item is cataloged by the U.S. Government under National Stock Number 1620-01-419-7919. Manufacturer of record part number: S4445080-64.

Also searched as 1620-01-419-7919 · 1620014197919 · NIIN 014197919 · 01-419-7919 · FSC 1620 Aircraft Landing Gear Components · CAGE 09257 · S4445080-64

Nearby stock numbers ← 1620-01-419-7915 Mounting Ring, Piston · 1620-01-419-9152 Pin, Trunnion →

Features

Ring,expander — FSC 1620
1 manufacturer part number on file
Manufacturer of record: Trelleborg Sealing Solutions Us, Inc.

Identification

NSN: 1620-01-419-7919
NIIN: 014197919
FSC: 1620 — Aircraft Landing Gear Components
FSG: 16 — Aircraft Components and Accessories
Primary part number: S4445080-64
Manufacturer: Trelleborg Sealing Solutions Us, Inc.

General Description

The Ring,expander, cataloged under National Stock Number 1620-01-419-7919, is classified within Federal Supply Class 1620 (Aircraft Landing Gear Components) of the Aircraft Components and Accessories group. The manufacturer of record is Trelleborg Sealing Solutions Us, Inc.. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.

Technical Specifications

Parameter	Value
NSN	1620-01-419-7919
Primary Part Number	S4445080-64
Item Name	Ring,expander
FSC / FSG	1620 / 16 — Aircraft Landing Gear Components
Manufacturer	Trelleborg Sealing Solutions Us, 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
S4445080-64 PRIMARY	Trelleborg Sealing Solutions Us, Inc. (USA)

Reference documents

Reference	Meaning
S4445080-64	5/2 Secondary reference U.S. Government activity

No interchangeability data on file.

Other items in FSC 1620 — Aircraft Landing Gear Components

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

1620-00-001-2466

HOUSING,GEARBOX,KNE

1620-00-001-2467

HOUSING,GEARBOX,KNE

1620-00-001-2468

1620-00-001-2468 · Item name not on file

1620-00-001-3929

LEVER ASSEMBLY

1620-00-001-4483

CYLINDER LANDING GE

1620-00-001-6577

1620-00-001-6577 · Item name not on file

1620-00-001-6942

END PLATE,POWER ST

1620-00-003-0391

DRAG BRACE,LANDING GEAR

Frequently Asked Questions

What is NSN 1620-01-419-7919?

NSN 1620-01-419-7919 is a Ring,expander, manufactured by Trelleborg Sealing Solutions Us, Inc., classified under FSC 1620, Aircraft Landing Gear Components. Status: active.

What part numbers are listed for NSN 1620-01-419-7919?

NSN 1620-01-419-7919 has 1 manufacturer part number on file: S4445080-64 (Trelleborg Sealing Solutions Us, Inc.).

What are the specifications of S4445080-64?

Key specifications for S4445080-64: End Item Identification: C-17A ACFT A. 0 specifications are documented in the U.S. Government catalog.

Is NSN 1620-01-419-7919 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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