PartsTable TECHNICAL DATA SHEET

NSN 4320-01-220-2121Government record, cited

CAGE, Thrust4320-01-220-2121

NSN 4320-01-220-2121 · NIIN 012202121 · Part number SG-4657 PIECE 29

Siemens Energy, Inc. · FSC 4320 — Power and Hand Pumps · FSG 43 — Pumps and Compressors · CAGE 16712

Government record, cited

NSN 4320-01-220-2121 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-220-2121. Manufacturer of record part number: SG-4657 PIECE 29.

Also searched as 4320-01-220-2121 · 4320012202121 · NIIN 012202121 · 01-220-2121 · FSC 4320 Power and Hand Pumps · CAGE 16712 · SG-4657 PIECE 29 · SG-4657

Nearby stock numbers ← 4320-01-220-2118 Ring, Socket · 4320-01-220-2140 Casing Assembly →

Features

Cage,thrust — FSC 4320
1 manufacturer part number on file
Manufacturer of record: Siemens Energy, Inc.

Identification

NSN: 4320-01-220-2121
NIIN: 012202121
FSC: 4320 — Power and Hand Pumps
FSG: 43 — Pumps and Compressors
Primary part number: SG-4657 PIECE 29
Manufacturer: Siemens Energy, Inc.

General Description

The Cage,thrust, cataloged under National Stock Number 4320-01-220-2121, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Siemens Energy, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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	Cage,thrust
FSC / FSG	4320 — Power and Hand Pumps (FSG 43)
Manufacturers	Siemens Energy, Inc. (CAGE 16712)

Technical Specifications

Parameter	Value
NSN	4320-01-220-2121
Primary Part Number	SG-4657 PIECE 29
Item Name	Cage,thrust
FSC / FSG	4320 / 43 — Power and Hand Pumps
Manufacturer	Siemens Energy, 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
SG-4657 PIECE 29 PRIMARY	Siemens Energy, Inc. (USA)

Reference documents

Reference	Meaning
SG-4657 PIECE 29	5/9 Secondary reference Circor Pumps North America Llc
SG-4657	D/9 Drawing number reference only Siemens Energy, Inc.

No interchangeability data on file.

Other items in FSC 4320 — Power and Hand Pumps

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

4320-00-001-1633

4320-00-001-1633 · Item name not on file

4320-00-001-2628

RETAINER AND PIN

4320-00-001-2629

HOUSING AND PIN

4320-00-001-2630

PUMP,CENTRIFUGAL

4320-00-001-2631

4320-00-001-2631 · Item name not on file

4320-00-001-2632

4320-00-001-2632 · Item name not on file

4320-00-001-3377

4320-00-001-3377 · Item name not on file

4320-00-001-3384

4320-00-001-3384 · Item name not on file

Frequently Asked Questions

What is NSN 4320-01-220-2121?

NSN 4320-01-220-2121 is a Cage,thrust, manufactured by Siemens Energy, Inc., classified under FSC 4320, Power and Hand Pumps. Status: active.

What part numbers are listed for NSN 4320-01-220-2121?

NSN 4320-01-220-2121 has 1 manufacturer part number on file: SG-4657 PIECE 29 (Siemens Energy, Inc.).

Is NSN 4320-01-220-2121 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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