Impeller, Pump, Centrifugal4320-01-040-3657

NSN 4320-01-040-3657 · NIIN 010403657

FSC 4320 — Power and Hand Pumps · FSG 43 — Pumps and Compressors

Government record, cited

Also searched as 4320-01-040-3657 · 4320010403657 · NIIN 010403657 · 01-040-3657 · FSC 4320 Power and Hand Pumps · CA8815-5-7-3/4SS · CA11144SS7 3-4

Nearby stock numbers ← 4320-01-040-3177 · 4320-01-040-3709 Pump, Axial Pistons →

Features

Impeller,pump,centrifugal — FSC 4320
Keyway Type: RECTANGULAR
Keyway Depth: 0.109 INCHES NOMINAL IN
Hub Bore Diameter: 0.375 INCHES NOMINAL IN
Hub Length: 2.250 INCHES NOMINAL IN
Design Type: SINGLE WIDTH
Overall Diameter: 7.750 INCHES NOMINAL IN
Mounting Method: KEY AND SETSCREW

Identification

NSN: 4320-01-040-3657
NIIN: 010403657
FSC: 4320 — Power and Hand Pumps
FSG: 43 — Pumps and Compressors

General Description

The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-01-040-3657, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4320-01-040-3657
Item Name	Impeller,pump,centrifugal
FSC / FSG	4320 / 43 — Power and Hand Pumps
Status	ACTIVE
Keyway Type	RECTANGULAR
Keyway Depth	0.109 INCHES NOMINAL IN
Hub Bore Diameter	0.375 INCHES NOMINAL IN
Hub Length	2.250 INCHES NOMINAL IN
Design Type	SINGLE WIDTH
Overall Diameter	7.750 INCHES NOMINAL IN
Mounting Method	KEY AND SETSCREW
Setscrew Quantity	3
Keyway Quantity	1
Hub Projection Length Beyond Wheel Side	0.500 INCHES NOMINAL IN
Blade Quantity	5
Size Designator	0.375-16NC
Keyway Length	2.250 INCHES NOMINAL IN
Hub Quantity	1
Hub Location	BACK SIDE
Keyway Width	0.312 INCHES NOMINAL IN
Material	STEEL CORROSION RESISTING
Rotation Direction for Which Designed	COUNTERCLOCKWISE
Blade Type	FORWARD CURVE

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

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

Reference documents

Reference	Meaning
CA8815-5-7-3/4SS	3/2 Design control — primary reference U.S. Government activity
CA11144SS7 3-4	5/9 Secondary reference U.S. Government activity

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 4320-01-040-3657?

NSN 4320-01-040-3657 is a Impeller,pump,centrifugal, classified under FSC 4320, Power and Hand Pumps. Status: active.

What are the specifications of 4320-01-040-3657?

Key specifications for 4320-01-040-3657: Keyway Type: RECTANGULAR; Keyway Depth: 0.109 INCHES NOMINAL IN; Hub Bore Diameter: 0.375 INCHES NOMINAL IN; Hub Length: 2.250 INCHES NOMINAL IN. 19 specifications are documented in the U.S. Government catalog.

Is NSN 4320-01-040-3657 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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