Clutch Drum, Crawler2520-00-149-7256

NSN 2520-00-149-7256 · NIIN 001497256 · Part number 2B1579

Caterpillar Inc Div Caterpillar Defense · FSC 2520 — Vehicular Power Transmission Components · FSG 25 — Vehicular Equipment Components · CAGE 11083

Government record, cited

NSN 2520-00-149-7256 — this item is cataloged by the U.S. Government under National Stock Number 2520-00-149-7256. Manufacturer of record part number: 2B1579.

Also searched as 2520-00-149-7256 · 2520001497256 · NIIN 001497256 · 00-149-7256 · FSC 2520 Vehicular Power Transmission Components · CAGE 11083 · 2B1579

Nearby stock numbers ← 2520-00-149-7255 · 2520-00-149-7258 →

Features

Clutch Drum,crawler — FSC 2520
1 manufacturer part number on file
Manufacturer of record: Caterpillar Inc Div Caterpillar Defense

Identification

NSN: 2520-00-149-7256
NIIN: 001497256
FSC: 2520 — Vehicular Power Transmission Components
FSG: 25 — Vehicular Equipment Components
Primary part number: 2B1579
Manufacturer: Caterpillar Inc Div Caterpillar Defense

General Description

The Clutch Drum,crawler, cataloged under National Stock Number 2520-00-149-7256, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Catalog Facts

Item Name	Clutch Drum,crawler
FSC / FSG	2520 — Vehicular Power Transmission Components (FSG 25)
Manufacturers	Caterpillar Inc Div Caterpillar Defense (CAGE 11083)

Technical Specifications

Parameter	Value
NSN	2520-00-149-7256
Primary Part Number	2B1579
Item Name	Clutch Drum,crawler
FSC / FSG	2520 / 25 — Vehicular Power Transmission Components
Manufacturer	Caterpillar Inc Div Caterpillar Defense
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	Possible hazard — SDS may be required (DLA HMIC P)

⇄ Related Items 1

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

3020-01-435-87072B1-579 POSSIBLE MATCH

GEAR,SPUR

Possible match (shared part number)Lake Shore Systems, Inc.

Cross-Reference Index

Part Number	Manufacturer
2B1579 PRIMARY	Caterpillar Inc Div Caterpillar Defense (USA)

Related Parts

3020-01-435-8707POSSIBLE MATCH

GEAR,SPUR

2B1-579

Frequently Asked Questions

What is NSN 2520-00-149-7256?

NSN 2520-00-149-7256 is a Clutch Drum,crawler, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.

What part numbers are listed for NSN 2520-00-149-7256?

NSN 2520-00-149-7256 has 1 manufacturer part number on file: 2B1579 (Caterpillar Inc Div Caterpillar Defense).

What NSN replaces 2520-00-149-7256?

1 possible match (shared part number, not a government interchangeability claim): 3020-01-435-8707. Verify interchangeability with system specifications before substitution.

Is NSN 2520-00-149-7256 hazardous material?

Possible hazard — SDS may be required (DLA HMIC P). 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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