Ring, Wearing4320-01-254-5553

NSN 4320-01-254-5553 · NIIN 012545553 · Part number A0NAI-12588A

M.t. Davidson Company · FSC 4320 — Power and Hand Pumps · FSG 43 — Pumps and Compressors · CAGE 16062

Government record, cited

NSN 4320-01-254-5553 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-254-5553. Manufacturer of record part number: A0NAI-12588A.

Also searched as 4320-01-254-5553 · 4320012545553 · NIIN 012545553 · 01-254-5553 · FSC 4320 Power and Hand Pumps · CAGE 16062 · A0NAI-12588A · GCP321 PIECE 46

Nearby stock numbers ← 4320-01-254-5552 · 4320-01-254-5919 →

Features

Ring,wearing — FSC 4320
Corner Shape: SQUARE ALL CORNERS
Body Style: PLAIN
Body Outside Diameter: 4.500 INCHES NOMINAL IN
Unthreaded Mounting Hole Diameter: 0.280 INCHES NOMINAL IN
Body Inside Diameter: 4.125 INCHES NOMINAL IN
Bolt Hole Quantity: 2
Material: COPPER ALLOY

Identification

NSN: 4320-01-254-5553
NIIN: 012545553
FSC: 4320 — Power and Hand Pumps
FSG: 43 — Pumps and Compressors
Primary part number: A0NAI-12588A
Manufacturer: M.t. Davidson Company

General Description

The Ring,wearing, cataloged under National Stock Number 4320-01-254-5553, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is M.t. Davidson Company. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4320-01-254-5553
Primary Part Number	A0NAI-12588A
Item Name	Ring,wearing
FSC / FSG	4320 / 43 — Power and Hand Pumps
Manufacturer	M.t. Davidson Company
Status	ACTIVE
Corner Shape	SQUARE ALL CORNERS
Body Style	PLAIN
Body Outside Diameter	4.500 INCHES NOMINAL IN
Unthreaded Mounting Hole Diameter	0.280 INCHES NOMINAL IN
Body Inside Diameter	4.125 INCHES NOMINAL IN
Bolt Hole Quantity	2
Material	COPPER ALLOY

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
GCP321 PIECE 46	M.t. Davidson Company (USA)
A0NAI-12588A PRIMARY	M.t. Davidson Company (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 4320-01-254-5553?

NSN 4320-01-254-5553 is a Ring,wearing, manufactured by M.t. Davidson Company, classified under FSC 4320, Power and Hand Pumps. Status: active.

What part numbers are listed for NSN 4320-01-254-5553?

NSN 4320-01-254-5553 has 2 manufacturer part numbers on file: GCP321 PIECE 46 (M.t. Davidson Company), A0NAI-12588A (M.t. Davidson Company).

What are the specifications of A0NAI-12588A?

Key specifications for A0NAI-12588A: Corner Shape: SQUARE ALL CORNERS; Body Style: PLAIN; Body Outside Diameter: 4.500 INCHES NOMINAL IN; Unthreaded Mounting Hole Diameter: 0.280 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.

Is NSN 4320-01-254-5553 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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