Piston, Pump4320-01-261-4191

NSN 4320-01-261-4191 · NIIN 012614191

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

Government record, cited

Also searched as 4320-01-261-4191 · 4320012614191 · NIIN 012614191 · 01-261-4191 · FSC 4320 Power and Hand Pumps · CN464051 · CN464.051

Nearby stock numbers ← 4320-01-261-4172 Impeller, Pump, Centrifugal · 4320-01-261-5031 Ring, Wearing →

Features

Piston,pump — FSC 4320
FSC Application Data: PUMP,HYDRAULIC,HAND DRIVEN
Integral Connecting Rod: NOT INCLUDED
Retaining Ring Groove: NOT INCLUDED
Surface Finish: FINISHED
Diameter: 1.125 INCHES NOMINAL IN
Pin: NOT INCLUDED
Oil Groove: NOT INCLUDED

Identification

NSN: 4320-01-261-4191
NIIN: 012614191
FSC: 4320 — Power and Hand Pumps
FSG: 43 — Pumps and Compressors

General Description

The Piston,pump, cataloged under National Stock Number 4320-01-261-4191, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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	4320-01-261-4191
Item Name	Piston,pump
FSC / FSG	4320 / 43 — Power and Hand Pumps
Status	ACTIVE
FSC Application Data	PUMP,HYDRAULIC,HAND DRIVEN
Integral Connecting Rod	NOT INCLUDED
Retaining Ring Groove	NOT INCLUDED
Surface Finish	FINISHED
Diameter	1.125 INCHES NOMINAL IN
Pin	NOT INCLUDED
Oil Groove	NOT INCLUDED
Head Style	FLAT
Skirt Bottom Cutaway Feature	NOT INCLUDED
Finished Size Designation	STANDARD
Ring	NOT INCLUDED
Functional Description	HYD PUMP PLUNGER
Pin Hole Bushing	NOT INCLUDED
Skirt Type	SOLID
Type/model Designation	P-84/EH-84

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
CN464051	5/9 Secondary reference Enerpac Tool Group Corp
CN464.051	3/9 Design control — primary reference Enerpac Tool Group Corp

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 4320-01-261-4191?

NSN 4320-01-261-4191 is a Piston,pump, classified under FSC 4320, Power and Hand Pumps. Status: active.

What are the specifications of 4320-01-261-4191?

Key specifications for 4320-01-261-4191: FSC Application Data: PUMP,HYDRAULIC,HAND DRIVEN; Integral Connecting Rod: NOT INCLUDED; Retaining Ring Groove: NOT INCLUDED; Surface Finish: FINISHED. 15 specifications are documented in the U.S. Government catalog.

Is NSN 4320-01-261-4191 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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