PartsTable TECHNICAL DATA SHEET

NSN 4320-01-253-2057Government record, cited

Idler, Pump4320-01-253-2057

NSN 4320-01-253-2057 · NIIN 012532057 · Part number RSC250B

Circor Pumps North America Llc · FSC 4320 — Power and Hand Pumps · FSG 43 — Pumps and Compressors · CAGE 59180

Government record, cited

NSN 4320-01-253-2057 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-253-2057. Manufacturer of record part number: RSC250B.

Also searched as 4320-01-253-2057 · 4320012532057 · NIIN 012532057 · 01-253-2057 · FSC 4320 Power and Hand Pumps · CAGE 59180 · RSC250B

Nearby stock numbers ← 4320-01-253-1880 Parts Kit, Seal Replacement, Mechanical Equipment · 4320-01-253-2222 Pump, Reciprocating →

Features

Idler,pump — FSC 4320
1 manufacturer part number on file
Manufacturer of record: Circor Pumps North America Llc

Identification

NSN: 4320-01-253-2057
NIIN: 012532057
FSC: 4320 — Power and Hand Pumps
FSG: 43 — Pumps and Compressors
Primary part number: RSC250B
Manufacturer: Circor Pumps North America Llc

General Description

The Idler,pump, cataloged under National Stock Number 4320-01-253-2057, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Circor Pumps North America Llc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Catalog Facts

Item Name	Idler,pump
FSC / FSG	4320 — Power and Hand Pumps (FSG 43)
Manufacturers	Circor Pumps North America Llc (CAGE 59180)

Technical Specifications

Parameter	Value
NSN	4320-01-253-2057
Primary Part Number	RSC250B
Item Name	Idler,pump
FSC / FSG	4320 / 43 — Power and Hand Pumps
Manufacturer	Circor Pumps North America Llc
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL Q — CCL Item — Commerce Control List
Hazard	No hazard code in the DLA record (HMIC N)

Cross-Reference Index

Part Number	Manufacturer
RSC250B PRIMARY	Circor Pumps North America Llc (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 4320-01-253-2057?

NSN 4320-01-253-2057 is a Idler,pump, manufactured by Circor Pumps North America Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.

What part numbers are listed for NSN 4320-01-253-2057?

NSN 4320-01-253-2057 has 1 manufacturer part number on file: RSC250B (Circor Pumps North America Llc).

Is NSN 4320-01-253-2057 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.

What is the DEMIL code for NSN 4320-01-253-2057?

NSN 4320-01-253-2057 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.

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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