PartsTable TECHNICAL DATA SHEET

NSN 4320-01-201-1887Government record, cited

Piston Assembly, Pum4320-01-201-1887

NSN 4320-01-201-1887 · NIIN 012011887 · Part number XK-17

Circor Naval Solutions Llc Dba Warren Pumps · FSC 4320 — Power and Hand Pumps · FSG 43 — Pumps and Compressors · CAGE 63857

Government record, cited

NSN 4320-01-201-1887 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-201-1887. Manufacturer of record part number: XK-17.

Also searched as 4320-01-201-1887 · 4320012011887 · NIIN 012011887 · 01-201-1887 · FSC 4320 Power and Hand Pumps · CAGE 63857 · XK-17 · A-1591 PIECE 40 TO 46 · A-1591

Nearby stock numbers ← 4320-01-201-1886 Drive Shaft and Pis · 4320-01-201-2338 Pump, Rotary →

Features

Piston Assembly,pum — FSC 4320
1 manufacturer part number on file
Manufacturer of record: Circor Naval Solutions Llc Dba Warren Pumps

Identification

NSN: 4320-01-201-1887
NIIN: 012011887
FSC: 4320 — Power and Hand Pumps
FSG: 43 — Pumps and Compressors
Primary part number: XK-17
Manufacturer: Circor Naval Solutions Llc Dba Warren Pumps

General Description

The Piston Assembly,pum, cataloged under National Stock Number 4320-01-201-1887, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Circor Naval Solutions Llc Dba Warren Pumps. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Catalog Facts

Item Name	Piston Assembly,pum
FSC / FSG	4320 — Power and Hand Pumps (FSG 43)
Manufacturers	Circor Naval Solutions Llc Dba Warren Pumps (CAGE 63857)

Technical Specifications

Parameter	Value
NSN	4320-01-201-1887
Primary Part Number	XK-17
Item Name	Piston Assembly,pum
FSC / FSG	4320 / 43 — Power and Hand Pumps
Manufacturer	Circor Naval Solutions Llc Dba Warren Pumps
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)

⇄ Related Items 9

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

4320-01-201-2392YF-24 POSSIBLE MATCH

BASE,PUMP

Possible match (shared part number)Circor Naval Solutions Llc Dba Warren Pumps

4320-01-201-7176TB-29 POSSIBLE MATCH

STEAM CHEST ASSEMBL

Possible match (shared part number)Circor Naval Solutions Llc Dba Warren Pumps

4320-01-201-7574VC-20 POSSIBLE MATCH

PEDESTAL PIN ASSEMBLY

Possible match (shared part number)Circor Naval Solutions Llc Dba Warren Pumps

4320-01-231-6704UU-45 POSSIBLE MATCH

HOUSING,LIQUID PUMP

Possible match (shared part number)Circor Naval Solutions Llc Dba Warren Pumps

4320-01-231-6705XY-24 POSSIBLE MATCH

HOUSING,LIQUID PUMP

Possible match (shared part number)Circor Naval Solutions Llc Dba Warren Pumps

4320-01-231-6726WL-38 POSSIBLE MATCH

CONNECTING ROD,PISTON

Possible match (shared part number)Circor Naval Solutions Llc Dba Warren Pumps

4320-01-231-6727WL-39 POSSIBLE MATCH

CONNECTING ROD,PISTON

Possible match (shared part number)Circor Naval Solutions Llc Dba Warren Pumps

5935-01-277-2120B4039876-2 POSSIBLE MATCH

GUIDE,ELECTRICAL CONNECTOR

Possible match (shared part number)Department of the Army Hq United States Army Communications Research and Development Command

1680-01-479-6055A159-1A POSSIBLE MATCH

CONT,FIRE WARN

Possible match (shared part number)Honeywell International Inc. Dba Honeywell Div Aerospace ? Redmond Commercial

Cross-Reference Index

Part Number	Manufacturer
XK-17 PRIMARY	Circor Naval Solutions Llc Dba Warren Pumps (USA)

Reference documents

Reference	Meaning
A-1591 PIECE 40 TO 46	5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps
A-1591	D/9 Drawing number reference only Circor Naval Solutions Llc Dba Warren Pumps

Related Parts

4320-01-201-2392POSSIBLE MATCH

BASE,PUMP

YF-24

4320-01-201-7176POSSIBLE MATCH

STEAM CHEST ASSEMBL

TB-29

4320-01-201-7574POSSIBLE MATCH

PEDESTAL PIN ASSEMBLY

VC-20

4320-01-231-6704POSSIBLE MATCH

HOUSING,LIQUID PUMP

UU-45

4320-01-231-6705POSSIBLE MATCH

HOUSING,LIQUID PUMP

XY-24

4320-01-231-6726POSSIBLE MATCH

CONNECTING ROD,PISTON

WL-38

4320-01-231-6727POSSIBLE MATCH

CONNECTING ROD,PISTON

WL-39

5935-01-277-2120POSSIBLE MATCH

GUIDE,ELECTRICAL CONNECTOR

B4039876-2

1680-01-479-6055POSSIBLE MATCH

CONT,FIRE WARN

A159-1A

Frequently Asked Questions

What is NSN 4320-01-201-1887?

NSN 4320-01-201-1887 is a Piston Assembly,pum, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 4320, Power and Hand Pumps. Status: active.

What part numbers are listed for NSN 4320-01-201-1887?

NSN 4320-01-201-1887 has 1 manufacturer part number on file: XK-17 (Circor Naval Solutions Llc Dba Warren Pumps).

What NSN replaces 4320-01-201-1887?

9 possible matches (shared part number, not a government interchangeability claim): 4320-01-201-2392, 4320-01-201-7176, 4320-01-201-7574. Verify interchangeability with system specifications before substitution.

Is NSN 4320-01-201-1887 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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