Pump, Reciprocating4320-01-658-3751

NSN 4320-01-658-3751 · NIIN 016583751 · Part number 1531

Cat Pumps Corp · FSC 4320 — Power and Hand Pumps · FSG 43 — Pumps and Compressors · CAGE 57783

Government record, cited

NSN 4320-01-658-3751 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-658-3751. Manufacturer of record part number: 1531.

Also searched as 4320-01-658-3751 · 4320016583751 · NIIN 016583751 · 01-658-3751 · FSC 4320 Power and Hand Pumps · CAGE 57783 · 1531

Nearby stock numbers ← 4320-01-658-3650 Pump, Centrifugal · 4320-01-658-4184 Pump Unit, Centrifugal →

Features

Pump,reciprocating — FSC 4320
Discharge Connection Quantity: 2
Intake Connection Type: THREADED INTERNAL
Discharge Connection Type: UNTHREADED INTERNAL
Intake Connection Quantity: 2
1 manufacturer part number on file
Manufacturer of record: Cat Pumps Corp

Identification

NSN: 4320-01-658-3751
NIIN: 016583751
FSC: 4320 — Power and Hand Pumps
FSG: 43 — Pumps and Compressors
Primary part number: 1531
Manufacturer: Cat Pumps Corp

General Description

The Pump,reciprocating, cataloged under National Stock Number 4320-01-658-3751, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Cat Pumps Corp. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 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	4320-01-658-3751
Primary Part Number	1531
Item Name	Pump,reciprocating
FSC / FSG	4320 / 43 — Power and Hand Pumps
Manufacturer	Cat Pumps Corp
Status	ACTIVE
Discharge Connection Quantity	2
Intake Connection Type	THREADED INTERNAL
Discharge Connection Type	UNTHREADED INTERNAL
Intake Connection Quantity	2

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
1531 PRIMARY	Cat Pumps Corp (USA)

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 4320-01-658-3751?

NSN 4320-01-658-3751 is a Pump,reciprocating, manufactured by Cat Pumps Corp, classified under FSC 4320, Power and Hand Pumps. Status: active.

What part numbers are listed for NSN 4320-01-658-3751?

NSN 4320-01-658-3751 has 1 manufacturer part number on file: 1531 (Cat Pumps Corp).

What are the specifications of 1531?

Key specifications for 1531: Discharge Connection Quantity: 2; Intake Connection Type: THREADED INTERNAL; Discharge Connection Type: UNTHREADED INTERNAL; Part Name Assigned by Controlling Agency: PLUNGER PUMP. 4 specifications are documented in the U.S. Government catalog.

Is NSN 4320-01-658-3751 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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