Diaphragm, Pump, Special Shaped4310-01-620-1644

NSN 4310-01-620-1644 · NIIN 016201644 · Part number 20403-040

Flojet Corp · FSC 4310 — Compressors and Vacuum Pumps · FSG 43 — Pumps and Compressors · CAGE 0L724

Government record, cited

NSN 4310-01-620-1644 — this item is cataloged by the U.S. Government under National Stock Number 4310-01-620-1644. Manufacturer of record part number: 20403-040.

Also searched as 4310-01-620-1644 · 4310016201644 · NIIN 016201644 · 01-620-1644 · FSC 4310 Compressors and Vacuum Pumps · CAGE 0L724 · 20403-040

Nearby stock numbers ← 4310-01-620-0819 Compressor, Rotary · 4310-01-620-4215 Tank, Pressure →

Features

Diaphragm,pump,special Shaped — FSC 4310
1 manufacturer part number on file
Manufacturer of record: Flojet Corp

Identification

NSN: 4310-01-620-1644
NIIN: 016201644
FSC: 4310 — Compressors and Vacuum Pumps
FSG: 43 — Pumps and Compressors
Primary part number: 20403-040
Manufacturer: Flojet Corp

General Description

The Diaphragm,pump,special Shaped, cataloged under National Stock Number 4310-01-620-1644, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Flojet Corp. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4310-01-620-1644
Primary Part Number	20403-040
Item Name	Diaphragm,pump,special Shaped
FSC / FSG	4310 / 43 — Compressors and Vacuum Pumps
Manufacturer	Flojet Corp
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
20403-040 PRIMARY	Flojet Corp (USA)

No interchangeability data on file.

Other items in FSC 4310 — Compressors and Vacuum Pumps

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

4310-00-000-0050

COMPRESSOR UNIT,RECIPROCATING

4310-00-001-0059

4310-00-001-0059 · Item name not on file

4310-00-001-2044

MOUNTING PAD,TANK,PRESSURE

4310-00-001-3477

PARTS KIT,VACUUM PUMP

4310-00-001-3493

VACUUM PUMP,ROTARY

4310-00-001-6194

4310-00-001-6194 · Item name not on file

4310-00-001-6381

4310-00-001-6381 · Item name not on file

4310-00-001-7755

PARTS KIT,VACUUM PUMP

Frequently Asked Questions

What is NSN 4310-01-620-1644?

NSN 4310-01-620-1644 is a Diaphragm,pump,special Shaped, manufactured by Flojet Corp, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.

What part numbers are listed for NSN 4310-01-620-1644?

NSN 4310-01-620-1644 has 1 manufacturer part number on file: 20403-040 (Flojet Corp).

What are the specifications of 20403-040?

Key specifications for 20403-040: Part Name Assigned by Controlling Agency: DIAPHRAGM ASSEMBLY (INCLUDES SCREWS); End Item Identification: FLOJET "QUAD II DIAPHRAGM" 4405 SERIES AUTOMATIC WATER SYSTEM PUMP WITH INTERNAL BYPASS VALVE. 0 specifications are documented in the U.S. Government catalog.

Is NSN 4310-01-620-1644 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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