PartsTable TECHNICAL DATA SHEET

NSN 4320-01-556-7877Government record, cited

Window, Oil4320-01-556-7877

NSN 4320-01-556-7877 · NIIN 015567877 · Part number 7KP373

Oshkosh Defense Llc · FSC 4320 — Power and Hand Pumps · FSG 43 — Pumps and Compressors · CAGE 75Q65

Government record, cited

NSN 4320-01-556-7877 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-556-7877. Manufacturer of record part number: 7KP373.

Also searched as 4320-01-556-7877 · 4320015567877 · NIIN 015567877 · 01-556-7877 · FSC 4320 Power and Hand Pumps · CAGE 75Q65 · 7KP373 · 85123-855-2

Nearby stock numbers ← 4320-01-556-7462 Pump, Rotary · 4320-01-556-9548 Rotor, Pump →

Features

Window,oil — FSC 4320
1 manufacturer part number on file
Manufacturer of record: Oshkosh Defense Llc

Identification

NSN: 4320-01-556-7877
NIIN: 015567877
FSC: 4320 — Power and Hand Pumps
FSG: 43 — Pumps and Compressors
Primary part number: 7KP373
Manufacturer: Oshkosh Defense Llc

General Description

The Window,oil, cataloged under National Stock Number 4320-01-556-7877, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Oshkosh Defense Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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	Window,oil
FSC / FSG	4320 — Power and Hand Pumps (FSG 43)
Manufacturers	Oshkosh Defense Llc (CAGE 75Q65)

Technical Specifications

Parameter	Value
NSN	4320-01-556-7877
Primary Part Number	7KP373
Item Name	Window,oil
FSC / FSG	4320 / 43 — Power and Hand Pumps
Manufacturer	Oshkosh Defense Llc
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
7KP373 PRIMARY	Oshkosh Defense Llc (USA)

Reference documents

Reference	Meaning
85123-855-2	D/9 Drawing number reference only Oshkosh Corp
7KP373	5/9 Secondary reference Oshkosh 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 4320-01-556-7877?

NSN 4320-01-556-7877 is a Window,oil, manufactured by Oshkosh Defense Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.

What part numbers are listed for NSN 4320-01-556-7877?

NSN 4320-01-556-7877 has 1 manufacturer part number on file: 7KP373 (Oshkosh Defense Llc).

Is NSN 4320-01-556-7877 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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